I just read a book about psychology today, and there is a chapter about death and disease.

This chapter is about the use of the brain.

We can do two things to keep brain cells fresh and young.

The first is not to eat toxic and harmful substances, especially alcohol. Generally speaking, it means not smoking or drinking.

The second is to keep the brain running, which means that the more you use, the better, and the more you don't use, the easier it is to break down. It is better to pay attention to thinking and use more brains to prevent Alzheimer's disease. It is also better for the elderly to develop their hobbies as much as possible after retirement, or to continue their work before retirement.