並前往https://isvincent.pixnet.net/blog/post/34909289-excel-%E8%A8%88%E7%AE%97%E5%AF%A6%E9%9A%9B%E5%B9%B4%E9%BD%A1%28%E5%B9%B4%E6%9C%88%E6%97%A5%29-datedif
