他那爱挑剔的性格让同事们都避之不及，连标点符号的错误都要指出来。

His ___captious nature made colleagues avoid him, as he would point out even punctuation mistakes.

他总是提出一些刁钻的问题，试图让讨论陷入混乱。

He keeps raising ___captious questions to confuse the discussion.