内科学

例句：

1. 1. He is an expert in internalmedicine.
   他是内科医学的专家。
2. 2. The doctoradvised her to follow a healthy diet andexercise regularly for better health.
   医生建议她保持健康的饮食和定期锻炼，以获得更好的健康。
3. 3. Internal medicine focuses onthe diagnosis and treatment of diseases within thebody.
   内科医学专注于诊断和治疗体内疾病。