fine-tooth comb
US /ˈfaɪn.tuːθ ˌkoʊm/
UK /ˈfaɪn.tuːθ ˌkoʊm/

1.
细致入微地, 彻底地
to examine something very carefully and thoroughly
:
•
The police went over the crime scene with a fine-tooth comb.
警方用细致入微的方式检查了犯罪现场。
•
We need to go through the contract with a fine-tooth comb before signing.
在签署合同之前,我们需要仔细审查。