是：

小心；照顧

tend/attend/nurse

be careful with的意思是：

小心；照顧

雙語例句：

1

Be careful withthat vase - it's very fragile.小心對待那個花瓶 它很容易碎

2

Be careful withthat —it cost a lot of money.小心別弄壞那東西，它可值錢了。

3

Be careful withdaily use.日常使用時要小心。