It was very perspicacious of you to find the cause of the trouble so quickly.

　　你真是明察秋毫，問題的原因這麼快就找出來了。

　　Objective To study the etiology of pertinacious chronic cough in children.

　　目的探討小兒難治性慢性咳嗽的病因。

　　Objective To evaluate the effect of nose endoscope in treating the pertinacious nosebleed.

　　目的：對頑固性鼻出血的鼻內鏡診治進行分析。

　　Results The curative effect of redundant colon-induced pertinacious constipation after operation was satisfactory.

　　結果結腸冗長癥所致的頑固性便秘術后效果較為滿意。

　　Questions buzzed in his head like pertinacious bees.

　　一連串問題在他腦子里盤旋著，就象糾纏不休的蜜蜂。