他总是对别人的计划吹毛求疵，即使是最小的细节也要挑剔。

He always ___cavils at others' plans, even finding fault with the smallest details.

她总是对细节吹毛求疵，甚至对咖啡的温度也要抱怨。

She always makes petty ___cavils, even complaining about the temperature of the coffee.