geriatrician

例句：

1. 1. Dr.Smith is a renowned geriatrician with over 30 years of experience in treating elderly patients.
   史密斯博士是一位著名的老年病学家，拥有30多年的治疗老年患者的经验。
2. 2. In his latest research, he focused on the impact of aging on cognitive function.
   在他的最新研究中，他关注了老龄化对认知功能的影响。
3. 3.The geriatrician recommended regular exercise and a healthy diet for seniors to maintain their health.
   这位老年病学家建议老年人定期锻炼和保持健康饮食以维护健康。