gerontism

例句：

1. 1. Gerontologists study the causes and treatments of age-related diseases.
   老年病学家研究与年龄相关的疾病的原因和治疗方法。
2. 2. The elderly often suffer from conditions that are common in older people.
   老年人往往患有中年人常见的疾病。
3. 3. As people live longer, more attention is being paid to the health issues faced by the elderly.
   随着人们寿命的延长，越来越多的人开始关注老年人的健康问题。