Certification audit, financial audit, performance and accountability audit etc. are audits for different purposes, while 递交相关的文件 (document review) and 现场审计 (on-site audit) are means of performing an audit.

Several months ago, my office was audited by an internal auditor from headquarters. Our conference room was occupied by him as his office for 3 days. He was authorized to have free access to any of our files and we were instructed to cooperate with him to answer any question raised by him. He was a lonely man as none of us showed friendly to a person 来挑刺的, although we understood that he was just doing his job.