This book, written by surgeon Keiyu Yamamoto, broadly explains the practical knowledge and mindset that medical residents need. It focuses not only on medical knowledge but also on the "small but important things" that are truly useful in the medical field. ① Practical Content: The book aims to bridge the gap between the knowledge required for the national medical licensing exam and the knowledge needed in the field. It is filled with advice based on the author's experiences as a resident, reflecting on what he wished he had known to make things easier. ② Wide Range of Topics: The book comprehensively covers a variety of issues that doctors face throughout their careers, including not only medical knowledge but also presentation skills, financial matters, and career development.