{
  "series": "每日经管知识+练习",
  "currentDay": 1,
  "lastDate": "2026-06-09",
  "topics": [
    {
      "day": 1,
      "date": "2026-06-09",
      "topic": "经济学的基本问题：稀缺性"
    }
  ]
}