1. meticulous, punctilious -- (marked by precise accordance with details; "meticulous research"; "punctilious in his attention to rules of etiquette")
2. meticulous -- (marked by extreme care in treatment of details; "a meticulous craftsman"; "almost worryingly meticulous in his business formalities")
1.
After listening to the porter's meticulous but perplexing directions, they prepared to leave the station. - from The Secret Adversary by Agatha Christie