at all
1．in any way； thoroughly全然地；在各方面
I don't agree with you at all．我完全不同意你的看法。
There was nothing to worry about at all．完全没有什么可担心的。
2．in the least；to the least extent or degree任何；最轻程度地
Do you feel ill at all？你感到有任何不适吗？
3．for any reason究竟
Do you know at all？你究竟知道不知道？