perspicacious
adj
(fml 文) having or showing great insight or judgement; discerning 有洞察力的; 判断力强的; 有识别力的
a perspicacious analysis of the problem 对问题的精辟分析
It was very perspicacious of you to find the cause of the trouble so quickly. 你真是明察秋毫, 问题的原因这麽快就找出来了.