To select a rectangular area of cells, point to a cell in one corner of the rectangle, hold down the mouse button, and drag the mouse to the opposite corner of the rectangle, then release the mouse button.
要在单元格中选择一个矩形区域，请点中矩形一个角上的单元格，按住鼠标不放并拖至矩形的对角处，然后松开鼠标。