Tā duì gōngzuò hěn jiàozhēn, jué bù yǔnxǔ rènhé cuòwù.
He is very meticulous about his work and does not tolerate any mistakes.
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较真 is a Beijing colloquial expression widely used in northern China. It can be neutral-to-positive (meticulous, thorough) or mildly negative (nitpicky, unable to let things go), depending on context.
