docs: def _fetch_stock_data(self, stock_list):
          """因为 timekline 的返回没有带对应的股票代码，所以要手动带上"""
          res = super()._fetch_stock_data(stock_list)
  
          with_stock = []
          for stock, resp in zip(stock_list, res):
              if resp is not None:
                  with_stock.append((stock, resp))
          return with_stock