we＼are proud of you ,boys and girls为什么这样回答

孩子们,我们为你们感到骄傲
你这样说,真是太好了
类似的还可以说：Thank you.
We are glad to hear it.
It is very kind of you to say so.
这里有一个考点,
因为nice修饰人的品行,所以后面用介词of