to search with a fine-toothed comb 仔细搜查（成语）

英文释义

(IDIOM) To search with very careful attention (NOTE: "fine" here means "very thin and narrow").

例句

Seeking clues to the murder, the police investigators searched the victim's house with a fine-toothed comb.
为了寻找这起谋杀案的线索，警探仔细搜查了被害人的房子。