It's simple. A fresh, comfortable, healthy and pleasant environment is of course the best. To meet such environmental requirements, these requirements must be followed: 1. Room temperature should be moderate, too high or too low is harmful to health. The human body has certain requirements for the temperature of the living environment, neither too high nor too low. Generally speaking, the most comfortable ambient temperature for human body is 25 -27t in summer and 18 -20t in winter. This is because, if the indoor temperature is too high, it will affect people's body temperature regulation function, which will cause temperature rise, vasodilation, pulse acceleration and heart rate acceleration due to poor heat dissipation; On the other hand, if the temperature of the fruit is too low, it will reduce the metabolic function of the human body, slow down the pulse and breathing, contract the subcutaneous blood vessels, overstrain the skin, weaken the resistance of the respiratory mucosa, and easily induce respiratory diseases. 2. The air humidity should be moderate, and it is the healthiest if it is dry and not wet. In life, most people are concerned about whether the indoor temperature is enough, but few people are concerned about the humidity of indoor air. In fact, air humidity is also closely related to human health. Generally speaking, the relative humidity that is most beneficial to life should be 45% -65%, and the environment with a humidity index of 50 -60 is the best. Because the humidity is too high in summer, people will feel sultry and irritable, and they will feel cold and depressed in winter. If the humidity is too low and the air is too dry, it will dehydrate the human body, resulting in rough and chapped skin, reducing the human body's resistance and easily infecting diseases. Therefore, the humidity of dry and wet air is most beneficial to daily health. 3. The indoor plants are well placed. Many people like to put some flowers or green plants at home, which can not only beautify the living environment, but also increase vitality and purify the air. However, flowers and plants can't be misplaced. For example, conifers belong to "Yang" and can be placed in a room facing south; Low-hanging round-leaved plants belong to shade and can be placed in a room facing north; Plants with thorns should be placed where people can't easily touch them. Put some mugwort leaves and honeysuckle in the bedroom of hypertensive patients, which has the effect of lowering blood pressure; People with insomnia can put some lavender on the bedside to speed up sleep. The environment we live in is the most suitable for human life only if it conforms to these "degrees". Living in such an environment will also make people feel more peaceful and natural, which is of great benefit to health.