Cách sử dụng
"When someone does something 'by the book,' it means they are following the rules or instructions exactly as they are written. This expression is often used in situations where it is important to follow rules, like in a job, school, or legal proceedings. For example, a police officer might say they arrested someone 'by the book' because they followed all the correct procedures. Overall, 'by the book' means to do something in a very precise and specific way, according to established guidelines."