{
  "questions": [
    {
      "id": "Q1",
      "text": "购买的灯不亮了，怎么维修？",
      "expected": "after_sales"
    },
    {
      "id": "Q2",
      "text": "首次如何调节亮度？",
      "expected": "usage"
    },
    {
      "id": "Q3",
      "text": "今天下雨吗？",
      "expected": "other"
    },
    {
      "id": "Q4",
      "text": "售后维修需要先设置什么？",
      "expected": "after_sales"
    }
  ]
}