be careful of 和be careful with的区别

be careful of …
注意,小心 后接名词,动名词或从句.
be careful with …
小心 后接做的事情

举个例子区别一下：
Please be careful of your spelling.
Be careful with the wet floor.

和一楼相反，我知道be careful of 是“关心、在意某人某事”的意思，但好像没有be careful with这个用法吧？

我怎么从来没听人说过be careful of