根据初始行数填充空白数据，然后在单击按钮时加载实际数据.

Populate using empty data according to the number of initial rows, then load real data when the button is clicked.

Stackblitz: https://stackblitz.com/edit/angular-f3g5vu?file=app%2Ftable-pagination-example.ts

Stackblitz: https://stackblitz.com/edit/angular-f3g5vu?file=app%2Ftable-pagination-example.ts