To be extremely cautious and prudent in one's words and actions; to exercise great care and discretion.
她在处理任何事情时都格外小心敬慎，力求做到滴水不漏。
She is exceptionally careful and prudent in handling any matter, striving to ensure everything is perfect.
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To be extremely cautious and prudent in one's words and actions; to exercise great care and discretion.