好象都不行
be careful跟的介词有以下几个：
be careful of/ with / about / in,没有跟to/for的用法
be careful about your money可以跟to是有的：So go ahead and enjoy your buffet…just be careful to take small portions.所以让我们享受我们的自助餐吧…只是需要注意只拿一小份。The gardeners need to be careful to pick it up .园丁们需要很小心的采摘蓖麻。to后面跟动词原形，是动词不定式的结构to 后面不跟名词的啊