The phrase "goes through with fine-tooth comb" refers to the act of meticulously examining something in great detail. There are a number of synonyms that can be used to convey the same meaning, such as "scrutinizes," "inspects closely," "analyses thoroughly," "dissects," and "checks meticulously." Other phrases that could be used in place of this idiom include "pores over," "examines carefully," "picks apart," and "thoroughly reviews." Regardless of the specific phrase used, the implication is always one of careful and detailed examination, with no detail left unchecked or unexamined.