diff --git a/CONTEXT.md b/CONTEXT.md
index 9ba46bd..c6f42fa 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -1,164 +1,164 @@
-# 项目上下文
-
-> AI启动时必读此文件，快速了解项目全貌
-
-## 一、项目信息
-
-| 项目 | 内容 |
-|------|------|
-| **项目编号** | 012-考培练系统-2601 |
-| **项目路径** | `projects/012-考培练系统-2601/` |
-| **当前阶段** | 开发阶段 |
-| **项目状态** | 🟢 活跃 |
-| **启动日期** | 2026-01-24 |
-| **技术栈** | Vue3 + TypeScript + FastAPI + MySQL |
-
-## 二、AI启动指令
-
-请依次阅读以下文件：
-
-1. **框架层**（了解规则）
-   - `../../_framework/agents/00-框架总览.md`
-   - 检查 `agents/` 是否有项目覆盖
-
-2. **项目文档**（了解当前状态）
-   - `docs/同步清单.md`
-   - `docs/项目状态快照.md`
-   - `docs/规划/系统架构.md`
-
-3. **技术文档**
-   - `docs/README.md` - 项目总览
-   - `backend/README.md` - 后端开发指南
-
-## 三、项目简介
-
-考培练系统是一个革命性的员工能力提升平台，专为轻医美连锁品牌瑞小美打造。通过集成 Coze 和 Dify 双 AI 平台，实现智能化的培训、考核和陪练功能。
-
-### 核心功能
-
-- **智能考试系统**：动态题目生成（千人千卷）、三轮考试机制
-- **AI陪练中心**：模拟客户对话、语音交互支持
-- **课程管理**：知识点自动提取、分岗位内容推送
-- **数据分析**：能力雷达图、学习进度追踪
-
-### 技术架构
-
-| 层级 | 技术栈 |
-|------|--------|
-| 前端 | Vue3 + TypeScript + Element Plus + Vite |
-| 后端 | Python 3.9+ + FastAPI + SQLAlchemy |
-| 数据库 | MySQL 8.0 + Redis |
-| AI平台 | Dify（动态考试）+ Coze（AI陪练） |
-| 部署 | Docker 容器化 |
-
-## 四、项目结构
-
-```
-012-考培练系统-2601/
-├── backend/              # 后端 (FastAPI)
-│   ├── app/              # 应用主目录
-│   │   ├── api/          # API路由
-│   │   ├── models/       # 数据模型
-│   │   ├── schemas/      # Pydantic schemas
-│   │   └── services/     # 业务逻辑
-│   └── requirements.txt
-├── frontend/             # 用户端前端 (Vue3)
-│   └── src/
-│       ├── api/          # API调用
-│       ├── views/        # 页面视图
-│       └── components/   # 组件
-├── admin-frontend/       # 管理端前端 (Vue3)
-├── deploy/               # 部署配置
-│   ├── docker/           # Docker compose 文件
-│   ├── nginx/            # Nginx 配置
-│   └── scripts/          # 启动/部署脚本
-├── docs/                 # 文档
-│   └── 规划/             # 系统规划文档
-├── tests/                # 测试文件
-├── 知识库/               # 开发记录、问题修复
-└── .env.*                # 环境配置
-```
-
-## 五、关键配置
-
-### 服务端口
-
-| 服务 | 端口 |
-|------|------|
-| 前端 | 3001 |
-| 后端 API | 8000 |
-| MySQL | 3306 |
-| Redis | 6379 |
-
-### 系统账户
-
-| 角色 | 用户名 | 密码 |
-|------|--------|------|
-| 超级管理员 | superadmin | Superadmin123! |
-| 系统管理员 | admin | Admin123! |
-| 测试学员 | testuser | TestPass123! |
-
-### 数据库连接
-
-- **服务器**: 120.79.247.16
-- **端口**: 3306
-- **数据库**: kaopeilian
-
-### Git 仓库配置
-
-| Remote | 地址 | 用途 |
-|--------|------|------|
-| `origin` | github.com/nongjun/ai-development-workspace | 源代码主仓库 |
-| `cicd` | git.ai.ireborn.com.cn/admin/012-kaopeilian | CI/CD 触发仓库 |
-
-**服务器路径**: `/root/aiedu`
-
-**使用方式**:
-```bash
-# 常规开发（推送到 GitHub）
-git push origin main
-
-# 触发 CI/CD 部署
-git push cicd main     # 生产环境（6个租户）
-git push cicd test     # 测试环境（kpl.ireborn.com.cn）
-```
-
-### CI/CD 配置
-
-| 分支 | 环境 | 域名 | 动作 |
-|------|------|------|------|
-| `test` | 测试环境 | https://kpl.ireborn.com.cn | 重建 dev 容器 |
-| `main` | 生产环境 | 6个租户域名 | 前端编译 + 后端重建 |
-
-**生产租户**: hua, yy, hl, xy, fw, ex, cxw
-
-### 租户端口分配
-
-| 租户 | 名称 | 域名 | 前端端口 | 后端端口 | Redis端口 |
-|------|------|------|----------|----------|-----------|
-| hua | 华尔倍丽 | hua.ireborn.com.cn | 3010 | 8010 | 6390 |
-| yy | 杨扬宠物 | yy.ireborn.com.cn | 3011 | 8011 | 6391 |
-| hl | 武汉禾丽 | hl.ireborn.com.cn | 3012 | 8012 | 6392 |
-| xy | 芯颜定制 | xy.ireborn.com.cn | 3013 | 8013 | 6393 |
-| fw | 飞沃 | fw.ireborn.com.cn | 3014 | 8014 | 6394 |
-| ex | 恩喜成都总院 | ex.ireborn.com.cn | 3015 | 8015 | 6395 |
-| cxw | 崔曦文 | cxw.ireborn.com.cn | 3016 | 8016 | 6396 |
-
-## 六、文件访问边界
-
-| 区域 | 读取 | 写入 |
-|------|------|------|
-| ✅ 本项目目录 | 允许 | 允许 |
-| ✅ `_framework/` | 允许 | ⚠️ 需确认 |
-| ⚠️ `_private/` | 需许可 | ❌ **绝对禁止** |
-| ❌ 其他项目 | 禁止 | 禁止 |
-
-## 七、注意事项
-
-- 多租户架构：支持多个机构独立部署（.env.fw, .env.hl 等）
-- AI集成：需配置 Coze 和 Dify API 密钥
-- 文件上传：使用 LibreOffice 转换 Office 文档
-
----
-
-> 最后更新：2026-01-24
+# 项目上下文
+
+> AI启动时必读此文件，快速了解项目全貌
+
+## 一、项目信息
+
+| 项目 | 内容 |
+|------|------|
+| **项目编号** | 012-考培练系统-2601 |
+| **项目路径** | `projects/012-考培练系统-2601/` |
+| **当前阶段** | 开发阶段 |
+| **项目状态** | 🟢 活跃 |
+| **启动日期** | 2026-01-24 |
+| **技术栈** | Vue3 + TypeScript + FastAPI + MySQL |
+
+## 二、AI启动指令
+
+请依次阅读以下文件：
+
+1. **框架层**（了解规则）
+   - `../../_framework/agents/00-框架总览.md`
+   - 检查 `agents/` 是否有项目覆盖
+
+2. **项目文档**（了解当前状态）
+   - `docs/同步清单.md`
+   - `docs/项目状态快照.md`
+   - `docs/规划/系统架构.md`
+
+3. **技术文档**
+   - `docs/README.md` - 项目总览
+   - `backend/README.md` - 后端开发指南
+
+## 三、项目简介
+
+考培练系统是一个革命性的员工能力提升平台，专为轻医美连锁品牌瑞小美打造。通过集成 Coze 和 Dify 双 AI 平台，实现智能化的培训、考核和陪练功能。
+
+### 核心功能
+
+- **智能考试系统**：动态题目生成（千人千卷）、三轮考试机制
+- **AI陪练中心**：模拟客户对话、语音交互支持
+- **课程管理**：知识点自动提取、分岗位内容推送
+- **数据分析**：能力雷达图、学习进度追踪
+
+### 技术架构
+
+| 层级 | 技术栈 |
+|------|--------|
+| 前端 | Vue3 + TypeScript + Element Plus + Vite |
+| 后端 | Python 3.9+ + FastAPI + SQLAlchemy |
+| 数据库 | MySQL 8.0 + Redis |
+| AI平台 | Dify（动态考试）+ Coze（AI陪练） |
+| 部署 | Docker 容器化 |
+
+## 四、项目结构
+
+```
+012-考培练系统-2601/
+├── backend/              # 后端 (FastAPI)
+│   ├── app/              # 应用主目录
+│   │   ├── api/          # API路由
+│   │   ├── models/       # 数据模型
+│   │   ├── schemas/      # Pydantic schemas
+│   │   └── services/     # 业务逻辑
+│   └── requirements.txt
+├── frontend/             # 用户端前端 (Vue3)
+│   └── src/
+│       ├── api/          # API调用
+│       ├── views/        # 页面视图
+│       └── components/   # 组件
+├── admin-frontend/       # 管理端前端 (Vue3)
+├── deploy/               # 部署配置
+│   ├── docker/           # Docker compose 文件
+│   ├── nginx/            # Nginx 配置
+│   └── scripts/          # 启动/部署脚本
+├── docs/                 # 文档
+│   └── 规划/             # 系统规划文档
+├── tests/                # 测试文件
+├── 知识库/               # 开发记录、问题修复
+└── .env.*                # 环境配置
+```
+
+## 五、关键配置
+
+### 服务端口
+
+| 服务 | 端口 |
+|------|------|
+| 前端 | 3001 |
+| 后端 API | 8000 |
+| MySQL | 3306 |
+| Redis | 6379 |
+
+### 系统账户
+
+| 角色 | 用户名 | 密码 |
+|------|--------|------|
+| 超级管理员 | superadmin | Superadmin123! |
+| 系统管理员 | admin | Admin123! |
+| 测试学员 | testuser | TestPass123! |
+
+### 数据库连接
+
+- **服务器**: 120.79.247.16
+- **端口**: 3306
+- **数据库**: kaopeilian
+
+### Git 仓库配置
+
+| Remote | 地址 | 用途 |
+|--------|------|------|
+| `origin` | github.com/nongjun/ai-development-workspace | 源代码主仓库 |
+| `cicd` | git.ai.ireborn.com.cn/admin/012-kaopeilian | CI/CD 触发仓库 |
+
+**服务器路径**: `/root/aiedu`
+
+**使用方式**:
+```bash
+# 常规开发（推送到 GitHub）
+git push origin main
+
+# 触发 CI/CD 部署
+git push cicd main     # 生产环境（6个租户）
+git push cicd test     # 测试环境（kpl.ireborn.com.cn）
+```
+
+### CI/CD 配置
+
+| 分支 | 环境 | 域名 | 动作 |
+|------|------|------|------|
+| `test` | 测试环境 | https://kpl.ireborn.com.cn | 重建 dev 容器 |
+| `main` | 生产环境 | 6个租户域名 | 前端编译 + 后端重建 |
+
+**生产租户**: hua, yy, hl, xy, fw, ex, cxw
+
+### 租户端口分配
+
+| 租户 | 名称 | 域名 | 前端端口 | 后端端口 | Redis端口 |
+|------|------|------|----------|----------|-----------|
+| hua | 华尔倍丽 | hua.ireborn.com.cn | 3010 | 8010 | 6390 |
+| yy | 杨扬宠物 | yy.ireborn.com.cn | 3011 | 8011 | 6391 |
+| hl | 武汉禾丽 | hl.ireborn.com.cn | 3012 | 8012 | 6392 |
+| xy | 芯颜定制 | xy.ireborn.com.cn | 3013 | 8013 | 6393 |
+| fw | 飞沃 | fw.ireborn.com.cn | 3014 | 8014 | 6394 |
+| ex | 恩喜成都总院 | ex.ireborn.com.cn | 3015 | 8015 | 6395 |
+| cxw | 崔曦文 | cxw.ireborn.com.cn | 3016 | 8016 | 6396 |
+
+## 六、文件访问边界
+
+| 区域 | 读取 | 写入 |
+|------|------|------|
+| ✅ 本项目目录 | 允许 | 允许 |
+| ✅ `_framework/` | 允许 | ⚠️ 需确认 |
+| ⚠️ `_private/` | 需许可 | ❌ **绝对禁止** |
+| ❌ 其他项目 | 禁止 | 禁止 |
+
+## 七、注意事项
+
+- 多租户架构：支持多个机构独立部署（.env.fw, .env.hl 等）
+- AI集成：需配置 Coze 和 Dify API 密钥
+- 文件上传：使用 LibreOffice 转换 Office 文档
+
+---
+
+> 最后更新：2026-01-24
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 6d72f34..b118363 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -7,6 +7,7 @@
     "": {
       "name": "kaopeilian-frontend",
       "version": "1.0.0",
+      "hasInstallScript": true,
       "dependencies": {
         "@coze/api": "^1.3.7",
         "@element-plus/icons-vue": "^2.3.1",
@@ -1056,129 +1057,6 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
-    "node_modules/@mapbox/node-pre-gyp": {
-      "version": "1.0.11",
-      "resolved": "https://registry.npmmirror.com/@mapbox/node-pre-gyp/-/node-pre-gyp-1.0.11.tgz",
-      "integrity": "sha512-Yhlar6v9WQgUp/He7BdgzOz8lqMQ8sU+jkCq7Wx8Myc5YFJLbEe7lgui/V7G1qB1DJykHSGwreceSaD60Y0PUQ==",
-      "dev": true,
-      "license": "BSD-3-Clause",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "detect-libc": "^2.0.0",
-        "https-proxy-agent": "^5.0.0",
-        "make-dir": "^3.1.0",
-        "node-fetch": "^2.6.7",
-        "nopt": "^5.0.0",
-        "npmlog": "^5.0.1",
-        "rimraf": "^3.0.2",
-        "semver": "^7.3.5",
-        "tar": "^6.1.11"
-      },
-      "bin": {
-        "node-pre-gyp": "bin/node-pre-gyp"
-      }
-    },
-    "node_modules/@mapbox/node-pre-gyp/node_modules/abbrev": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmmirror.com/abbrev/-/abbrev-1.1.1.tgz",
-      "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==",
-      "dev": true,
-      "license": "ISC",
-      "optional": true,
-      "peer": true
-    },
-    "node_modules/@mapbox/node-pre-gyp/node_modules/agent-base": {
-      "version": "6.0.2",
-      "resolved": "https://registry.npmmirror.com/agent-base/-/agent-base-6.0.2.tgz",
-      "integrity": "sha512-RZNwNclF7+MS/8bDg70amg32dyeZGZxiDuQmZxKLAlQjr3jGyLx+4Kkk58UO7D2QdgFIQCovuSuZESne6RG6XQ==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "debug": "4"
-      },
-      "engines": {
-        "node": ">= 6.0.0"
-      }
-    },
-    "node_modules/@mapbox/node-pre-gyp/node_modules/detect-libc": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmmirror.com/detect-libc/-/detect-libc-2.1.2.tgz",
-      "integrity": "sha512-Btj2BOOO83o3WyH59e8MgXsxEQVcarkUOpEYrubB0urwnN10yQ364rsiByU11nZlqWYZm05i/of7io4mzihBtQ==",
-      "dev": true,
-      "license": "Apache-2.0",
-      "optional": true,
-      "peer": true,
-      "engines": {
-        "node": ">=8"
-      }
-    },
-    "node_modules/@mapbox/node-pre-gyp/node_modules/https-proxy-agent": {
-      "version": "5.0.1",
-      "resolved": "https://registry.npmmirror.com/https-proxy-agent/-/https-proxy-agent-5.0.1.tgz",
-      "integrity": "sha512-dFcAjpTQFgoLMzC2VwU+C/CbS7uRL0lWmxDITmqm7C+7F0Odmj6s9l6alZc6AELXhrnggM2CeWSXHGOdX2YtwA==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "agent-base": "6",
-        "debug": "4"
-      },
-      "engines": {
-        "node": ">= 6"
-      }
-    },
-    "node_modules/@mapbox/node-pre-gyp/node_modules/make-dir": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmmirror.com/make-dir/-/make-dir-3.1.0.tgz",
-      "integrity": "sha512-g3FeP20LNwhALb/6Cz6Dd4F2ngze0jz7tbzrD2wAV+o9FeNHe4rL+yK2md0J/fiSf1sa1ADhXqi5+oVwOM/eGw==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "semver": "^6.0.0"
-      },
-      "engines": {
-        "node": ">=8"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
-    "node_modules/@mapbox/node-pre-gyp/node_modules/make-dir/node_modules/semver": {
-      "version": "6.3.1",
-      "resolved": "https://registry.npmmirror.com/semver/-/semver-6.3.1.tgz",
-      "integrity": "sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA==",
-      "dev": true,
-      "license": "ISC",
-      "optional": true,
-      "peer": true,
-      "bin": {
-        "semver": "bin/semver.js"
-      }
-    },
-    "node_modules/@mapbox/node-pre-gyp/node_modules/nopt": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmmirror.com/nopt/-/nopt-5.0.0.tgz",
-      "integrity": "sha512-Tbj67rffqceeLpcRXrT7vKAN8CwfPeIBgM7E6iBkmKLV7bEMwpGgYLGv0jACUsECaa/vuxP0IjEont6umdMgtQ==",
-      "dev": true,
-      "license": "ISC",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "abbrev": "1"
-      },
-      "bin": {
-        "nopt": "bin/nopt.js"
-      },
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/@napi-rs/canvas": {
       "version": "0.1.82",
       "resolved": "https://registry.npmmirror.com/@napi-rs/canvas/-/canvas-0.1.82.tgz",
@@ -2989,32 +2867,6 @@
         "url": "https://github.com/chalk/ansi-styles?sponsor=1"
       }
     },
-    "node_modules/aproba": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmmirror.com/aproba/-/aproba-2.1.0.tgz",
-      "integrity": "sha512-tLIEcj5GuR2RSTnxNKdkK0dJ/GrC7P38sUkiDmDuHfsHmbagTFAxDVIBltoklXEVIQ/f14IL8IMJ5pn9Hez1Ew==",
-      "dev": true,
-      "license": "ISC",
-      "optional": true,
-      "peer": true
-    },
-    "node_modules/are-we-there-yet": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmmirror.com/are-we-there-yet/-/are-we-there-yet-2.0.0.tgz",
-      "integrity": "sha512-Ci/qENmwHnsYo9xKIcUJN5LeDKdJ6R1Z1j9V/J5wyq8nh/mYPEpIKJbBZXtZjG04HiK7zV/p6Vs9952MrMeUIw==",
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-    "node_modules/tar/node_modules/minipass": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmmirror.com/minipass/-/minipass-5.0.0.tgz",
-      "integrity": "sha512-3FnjYuehv9k6ovOEbyOswadCDPX1piCfhV8ncmYtHOjuPwylVWsghTLo7rabjC3Rx5xD4HDx8Wm1xnMF7S5qFQ==",
-      "dev": true,
-      "license": "ISC",
-      "optional": true,
-      "peer": true,
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/terser": {
       "version": "5.44.0",
       "resolved": "https://registry.npmjs.org/terser/-/terser-5.44.0.tgz",
@@ -9172,44 +8646,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/wide-align": {
-      "version": "1.1.5",
-      "resolved": "https://registry.npmmirror.com/wide-align/-/wide-align-1.1.5.tgz",
-      "integrity": "sha512-eDMORYaPNZ4sQIuuYPDHdQvf4gyCF9rEEV/yPxGfwPkRodwEgiMUUXTx/dex+Me0wxx53S+NgUHaP7y3MGlDmg==",
-      "dev": true,
-      "license": "ISC",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "string-width": "^1.0.2 || 2 || 3 || 4"
-      }
-    },
-    "node_modules/wide-align/node_modules/emoji-regex": {
-      "version": "8.0.0",
-      "resolved": "https://registry.npmmirror.com/emoji-regex/-/emoji-regex-8.0.0.tgz",
-      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true
-    },
-    "node_modules/wide-align/node_modules/string-width": {
-      "version": "4.2.3",
-      "resolved": "https://registry.npmmirror.com/string-width/-/string-width-4.2.3.tgz",
-      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "emoji-regex": "^8.0.0",
-        "is-fullwidth-code-point": "^3.0.0",
-        "strip-ansi": "^6.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/word-wrap": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
@@ -9376,15 +8812,6 @@
         "node": ">=10"
       }
     },
-    "node_modules/yallist": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmmirror.com/yallist/-/yallist-4.0.0.tgz",
-      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
-      "dev": true,
-      "license": "ISC",
-      "optional": true,
-      "peer": true
-    },
     "node_modules/yargs": {
       "version": "17.7.2",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.2.tgz",
diff --git a/frontend/src/views/exam/practice.vue b/frontend/src/views/exam/practice.vue
index d3e7f61..a70ace4 100644
--- a/frontend/src/views/exam/practice.vue
+++ b/frontend/src/views/exam/practice.vue
@@ -349,21 +349,21 @@ const transformDifyQuestions = (difyQuestions: any[]): any[] => {
       // 更精确地提取正确答案字母（避免误提取选项内容中的字母）
       let correctLetters: string[] = []
       
-      // 情况1：纯选项字母格式（如 "A", "B", "A,B", "A、B", "A,B,C"）
-      const pureLetterMatch = correctAnswerStr.match(/^[A-Da-d]([,、\s]+[A-Da-d])*$/)
+      // 情况1：纯选项字母格式（如 "A", "B", "A,B", "A、B", "A,B,C,D,E"）
+      const pureLetterMatch = correctAnswerStr.match(/^[A-Za-z]([,、\s]+[A-Za-z])*$/)
       if (pureLetterMatch) {
-        correctLetters = correctAnswerStr.match(/[A-Da-d]/g)?.map(l => l.toUpperCase()) || []
+        correctLetters = correctAnswerStr.match(/[A-Za-z]/g)?.map(l => l.toUpperCase()) || []
         console.log(`   ✓ 匹配情况1(纯字母): correctLetters=[${correctLetters.join(',')}]`)
       } else {
         // 情况2：多选项带内容格式（如 "A：分组列,B：聚合函数,C：常量"）
         // 匹配所有 "X：" 或 "X:" 格式，提取字母
-        const multiOptionMatch = correctAnswerStr.match(/[A-Da-d](?=[：:])/g)
+        const multiOptionMatch = correctAnswerStr.match(/[A-Za-z](?=[：:])/g)
         if (multiOptionMatch && multiOptionMatch.length > 0) {
           correctLetters = multiOptionMatch.map(l => l.toUpperCase())
           console.log(`   ✓ 匹配情况2(多选项带内容): correctLetters=[${correctLetters.join(',')}]`)
         } else {
           // 情况3：只有开头字母（如 "A" 后面直接跟非字母内容）
-          const firstLetterMatch = correctAnswerStr.match(/^([A-Da-d])(?![A-Za-z])/)
+          const firstLetterMatch = correctAnswerStr.match(/^([A-Za-z])(?![A-Za-z])/)
           if (firstLetterMatch) {
             correctLetters = [firstLetterMatch[1].toUpperCase()]
             console.log(`   ✓ 匹配情况3(开头字母): correctLetters=[${correctLetters.join(',')}]`)
@@ -410,8 +410,8 @@ const transformDifyQuestions = (difyQuestions: any[]): any[] => {
         
         // 提取选项内容（去掉 "A：" 或 "A:" 前缀）
         let content = optStr
-        // 匹配 "A：xxx" 或 "A:xxx" 格式（支持中英文冒号）
-        const contentPrefixMatch = optStr.match(/^[A-Da-d]\s*[：:]\s*(.*)$/)
+        // 匹配 "A：xxx" 或 "A:xxx" 格式（支持中英文冒号，支持A-Z所有字母）
+        const contentPrefixMatch = optStr.match(/^[A-Za-z]\s*[：:]\s*(.*)$/)
         if (contentPrefixMatch) {
           content = contentPrefixMatch[1].trim()
         }
@@ -422,13 +422,13 @@ const transformDifyQuestions = (difyQuestions: any[]): any[] => {
         let letterSource = ''
         
         // 1. 尝试从选项内容前缀提取（如 "A：xxx" 或 "A:xxx"）
-        const prefixMatch = optStr.match(/^([A-Da-d])\s*[：:]/)
+        const prefixMatch = optStr.match(/^([A-Za-z])\s*[：:]/)
         if (prefixMatch) {
           optionLetter = prefixMatch[1].toUpperCase()
           letterSource = '内容前缀'
         }
-        // 2. 尝试从 key 提取（如果 key 是单个字母 A-D）
-        else if (key.match(/^[A-Da-d]$/)) {
+        // 2. 尝试从 key 提取（如果 key 是单个字母 A-Z）
+        else if (key.match(/^[A-Za-z]$/)) {
           optionLetter = key.toUpperCase()
           letterSource = 'key字母'
         }