Winter is a good season for tonic, and there is also a lot of food for the elderly. When purchasing, we should pay attention to the strong appetite in winter, and choose foods with high fever, high nutrition, strong flavor and strong nourishing, such as mutton, dog meat, beef, chicken and other animal supplements. If you are already sick, you should choose the tonic appropriately, and it is best to follow the doctor's advice and not blindly make it up.