Know what to do if you feel faint or dizzy, especially if you might fall and hit your head.

Know what to do if you feel faint or dizzy, especially if you might fall and hit your head.

知道当你感到头晕目眩时该怎么做，尤其是当你可能跌倒撞到头部时。

-- Marilyn vos Savant 玛丽莲·沃斯·莎凡特