go over/through something with a fine-tooth comb

US /ɡoʊ ˈoʊvər/θruː ˈsʌmˌθɪŋ wɪð ə faɪn-tuːθ koʊm/
UK /ɡoʊ ˈoʊvər/θruː ˈsʌmˌθɪŋ wɪð ə faɪn-tuːθ koʊm/
"go over/through something with a fine-tooth comb" picture
1.

綿密に調べる, 徹底的に調査する

to examine something very carefully, looking for mistakes or problems

:
The auditors will go over the accounts with a fine-tooth comb.
監査人は帳簿を綿密に調べるだろう。
We need to go through the contract with a fine-tooth comb before signing it.
署名する前に契約書を綿密に調べる必要がある。