Answer: 1. The physiological function of the elderly is declining, and bad hygiene habits are an important factor leading to the illness of the elderly. Knowing that the elderly establish a scientific lifestyle and develop good daily habits will reduce the risk of illness.

2. Mental health knowledge Mental health is an important part of health care for the elderly. It is of great significance to understand the psychological changes of the elderly and their psychological state, and to help them maintain a good mental state and mood.

3. Physical exercise and its common sense of safety. Regular and persistent exercise can enhance the functions of various systems of the elderly, delay aging and enhance physical fitness.

4. With the increase of age and the decline of physiological function, the elderly are prone to various systemic diseases. Carry out the prevention and treatment of common diseases, frequently-occurring diseases and chronic diseases in the elderly, so that the elderly can learn to take the initiative to prevent and treat diseases.

5. The knowledge of rational drug use needs to strengthen the education of rational drug use for the elderly, including the name, function, dosage, usage and precautions of commonly used drugs for the elderly, normal and abnormal drug reactions, drug interactions, rational drug use methods, storage methods and handling of drug accidents.

6, death education, the elderly will more clearly feel the approach of death, need to guide them how to look at the end of life, spend every day with a peaceful mind, enrich their lives and improve their quality of life.