punc·til·i·ous
adjective/pʌŋkˈtɪliəs/
/pʌŋkˈtɪliəs/
(formal)- very careful to behave correctly or to perform your duties exactly as you should
一丝不苟的；循规蹈矩的 - a punctilious host
一丝不苟的主人
Word Originmid 17th cent.: from French pointilleux, from pointille, from Italian puntiglio, diminutive of punto ‘a point’. - a punctilious host