punctilious

他总是准时并严格遵守规则，真是个一丝不苟的人。

He is always on time and strictly follows the rules, being very ___punctilious about his behavior.

她对细节一丝不苟，连文件上的每个标点符号都要检查。

She is so ___punctilious that she checks every punctuation mark in the documents.

那位一丝不苟的主人确保每位宾客的杯子始终是满的。

The ___punctilious host ensured each guest's glass was always full.