nitpicking

1. N-UNCOUNT If you refer to someone's opinion as nitpicking, you disapprove of the fact that it concentrates on small and unimportant details, especially to try and find fault with something. 挑刺儿; 找茬[表不满]

A lot of nit-picking was going on about irrelevant things. 对不相干的事情一直大肆吹毛求疵。

I can get down to nitpicking detail, I am pretty fussy about certain things. 我会挑剔细节，而且对某些事情我会相当吹毛求疵。