What is the principle of disease prevention after the first frost?

Every year, around Gregorian calendar 10 year 10 23rd, when the sun reaches longitude 2 10 degrees, it is the first frost. The first frost is a solar term reflecting weather phenomena and climate change. The ancient book "Twenty-four solar terms" says: "When the frost comes, the yin begins to coagulate." It can be seen that the first frost means that the weather is getting cold and it begins to frost. With the arrival of the first frost, crops and plants began to turn yellow and shed leaves.

Astronomical experts remind that the temperature drops rapidly after the first frost. Patients with gastrointestinal diseases, hypertension and cerebrovascular sclerosis should pay special attention to avoid strenuous exercise, maintain emotional stability and ease of mind, reduce going out in the morning and evening, and try to avoid being attacked by cold air. This is an effective way to actively prevent these three diseases. ?