I wanted to reply to your letter, but I can’t come at it anywhere.（我想回复你的信，但哪里也找不着了。）这里come at something表示找到什么东西。也可以表示发现什么，得到什么。如
It is always difficult to come at the truth.（得到真相往往很困难。）
The shrew came at her husband with a rolling-pin.（母老虎用擀面杖打她老公。）这里come at someone表示攻击某人。
