docs: def list_questions(self):
          """
          [deprecated] 建議使用方法 `get_question()`
          """
          # 取得新 API 的結果
          data = self.get_question()
          # 實作相容的結構
          result = {}
          for number in data:
              # 繳交期限
              deadline = data[number]['deadline']
              # 是否已經過期限
              expired = '期限已到' if data[number]['expired'] else '期限未到'
              # 是否繳交
              status = '已繳' if data[number]['status'] else '未繳'
              # 程式語言種類
              language = data[number]['language']
              # 儲存題目資訊
              result[number] = [deadline, expired, status, language]
          # 回傳結果
          return result