Generally speaking, the elderly should eat more light and digestible foods, such as protein, calcium and other foods beneficial to the body, such as bird's nest, soybean milk, yogurt and so on. The specific analysis is as follows:

1. Bird's Nest: It is good for the elderly to eat more bird's nest. Bird's nest is rich in nutrients such as protein, calcium, iron and potassium, which can enhance immunity, promote sleep and is easy to digest.

2. Soymilk: It is good for the elderly to eat more soy milk. Soybean milk is rich in protein, potassium, vitamin A, calcium and other nutrients. It is easy to digest and absorb, and has the effects of strengthening body, regulating endocrine and reducing blood fat.

3. Yogurt: It is good for the elderly to eat more yogurt. The main raw material of yogurt is milk, which is rich in protein, calcium, vitamin B 1, zinc and other nutrients. It can supplement nutrition, and yogurt also contains probiotics, which can improve intestinal function.

The elderly should ensure a balanced diet, keep enough sleep, avoid staying up late and avoid overwork.