be astute in trivial matters ❍ 此人～，鼠目寸光。He is astute in trivial matters,seeing only what is under his nose. ❍ 我决心遵照雍正皇帝“～” 的训示行事。(爱新觉罗·溥仪《我的前半生》 150)I decided to follow the advice of Yong Zheng to “make things clear through careful inves tigation”.
察察为明chá chá wéi mínɡ
多指在小事上精明。have a sharp eyes on the trifles, strain at a gnat