1. Geriatrist: A doctor who specializes in geriatric diseases. His main responsibility is to diagnose, treat, prevent and manage various diseases and symptoms of the elderly. These doctors have extensive medical knowledge, including internal medicine, surgery, neurology, psychiatry and other professional fields, thus providing comprehensive medical services for elderly patients.

2. Geriatric care doctor: a doctor who focuses on the care of the elderly. His main responsibility is to help the elderly keep healthy, prevent diseases and disabilities, and improve their quality of life. These doctors work closely with elderly patients and their families to make personalized health care plans, conduct regular health checks and assessments, and provide necessary medical and nursing services.