Meticulous

1. Extremely careful and precise.
2. Extremely or excessively concerned with details.

Synonyms: These adjectives mean showing or marked by attentiveness to all aspects or details. Meticulous and painstaking stress extreme care: "He had throughout been almost worryingly meticulous in his business formalities" (Arnold Bennett). Repairing the fine lace entailed slow and painstaking work.
Careful suggests circumspection and solicitude: A careful examination of the gem showed it to be fake.
Scrupulous suggests care prompted by conscience: "Cynthia was scrupulous in her efforts to give no trouble" (Winston Churchill).
Fastidious implies concern, often excessive, for the requirements of taste: "Your true lover of literature is never fastidious" (Robert Southey).
Punctilious specifically applies to minute details of conduct: "The more unpopular an opinion is, the more necessary is it that the holder should be somewhat punctilious in his observance of conventionalities generally" (Samuel Butler).