洞察秋毫 perceive every detail
Explanation
比喻目光敏锐，任何细微的事物都能看得很清楚。
To describe someone's sharp vision, able to see even the smallest things clearly.
Origin Story
战国时期，一位名叫孙膑的谋略家，因受陷害被剜去了膝盖骨，但他并没有因此而消沉，反而更加专注于军事战略的研究。有一次，魏国攻打赵国，魏王自认为实力强劲，胜券在握，便轻敌冒进，没有仔细研判赵军的部署。孙膑却能洞察秋毫，敏锐地觉察到魏军战略上的漏洞。他利用魏军轻敌的弱点，巧妙地设计了一个“围魏救赵”的战略，最终以少胜多，大败魏军。孙膑凭借其对战场局势的洞察秋毫，不仅成就了自己的军事传奇，也为后世留下了经典的兵法案例。这个故事告诉我们，只有具备敏锐的观察力和洞察力，才能在复杂的局势中把握先机，取得最终的胜利。
During the Warring States period, a strategist named Sun Bin was framed and had his kneecaps removed. However, he did not become depressed but instead focused even more on the study of military strategy. Once, Wei attacked Zhao, and the king of Wei, confident in his strength, launched a reckless attack without carefully analyzing Zhao's deployment. Sun Bin, however, could perceive every detail and keenly sensed the flaws in Wei's strategy. He used Wei's arrogance to his advantage, cleverly designing a "encircle Wei to rescue Zhao" strategy. In the end, he achieved a victory against overwhelming odds, routing the Wei army. Sun Bin, with his ability to perceive every detail of the battlefield, not only created his own military legend, but also left a classic example of military strategy for posterity. This story tells us that only with sharp observation and insight can one seize the initiative in complex situations and achieve ultimate victory.
Usage
用于形容人观察细致，能发现别人发现不了的细节。
Used to describe someone who is observant and can notice details that others miss.
Examples
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他洞察秋毫，发现了文件中的细微错误。
ta dongcha qiūhao, faxianle wenjian zhong de xiwei cuowu
He noticed the subtle errors in the document with his sharp eyes.
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侦探凭借他敏锐的洞察力，洞察秋毫，最终破获了案件。
zhentan pingjie ta minrui de dongchali, dongcha qiūhao, zhongyu pohuole anjian
The detective, with his keen observation, uncovered every detail and solved the case.