to有一个用法： 

★ used to show the person or thing that is affected by an action （引出受事者或受体）

对于，关于 She is devoted to her family. 她深深爱着自己的家庭。 her family is affected by an action？ What have you done to your hair? 你怎么把头发弄成这个样子？ your hair is affected by an action？ 请问这个用法如何理解？