📋 JSON格式说明

• type: 单选(single), 多选(multi), 判断(judge)
• q: 题目内容
• options: 选项数组（判断题可省略）
• a: 正确答案（多选用逗号分隔）
• analysis: 解析（可选）

💡 示例数据

[
  {"type":"single","q":"1+1=?","options":["1","2","3"],"a":"2","analysis":"基础加法"},
  {"type":"judge","q":"PHP是语言吗？","a":"正确","analysis":"PHP是脚本语言"},
  {"type":"multi","q":"Python特点？","options":["简单","免费"],"a":"简单,免费","analysis":"简洁开源"}
]