be at your wits' end
（因为非常担忧、迷惘或恼火而）全然不知所措、不知道下一步该怎么办
be frightened/scared/terrified out of your wits
把（某人）吓得魂不附体
have/keep (all) your wits about you
时刻保持头脑冷静；随机应变
live by your wits
靠耍小聪明赚钱；（有时）靠玩花招捞钱
gather your wits
镇静下来
not be beyond the wit of man/sb
没有超出人／某人的才智范围；可以实现
