循规蹈矩

循规蹈矩 [xún guī dǎo jǔ]

1. ■ His behavior appears rather stiff -- too observant of conventional standards.; accord with the custom and law; behave in a fit and proper way; be very orthodox in one's behaviour; follow the custom [law]; follow [obey] the [conventional] rules and regulations; hew to the line; obey [observe] discipline; observe due decorum; not to stop out of bounds; stick to convention; strictly upright and correct (in behaviour):

所有的学生， 在上学初期， 都很循规蹈矩。 At the beginning of the new term, all the students conscientiously obeyed the rules of the school.