一丝不苟

一絲不苟
gǒu
  1. not one thread loose (idiom); strictly according to the rules
  2. meticulous
  3. not one hair out of place

CEDICT

to be scrupulous about every detail; to not be the least bit negligent; to not overlook any detail

Wiktionary

做事认真一点也不马虎。《儒林外史第四》:「一丝不苟迁就指日。」一丝」。

重編國語辭典

做事认真一点也不马虎

維基詞典

Entry Composition

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