十萬火急！高分懸賞 沒有page up 和 page down
Macbook的鍵盤布局中沒有獨立的Home/End/PageUp/PageDown四個鍵，用Fn+方向鍵替代：
Fn + Left Home
Fn + Right En
Fn+Up PageUp
Fn + Down PageDown
Macbook的鍵盤布局中也只有Delete，而沒有獨立的Del (Forward Delete)：
Fn + delete 刪除 (Forward Delete)
Fn + Left Home
Fn + Right En
Fn+Up PageUp
Fn + Down PageDown
Macbook的鍵盤布局中也只有Delete，而沒有獨立的Del (Forward Delete)：
Fn + delete 刪除 (Forward Delete)