Note: 1, don't eat too much. Everything should be measured, and canned food is no exception. Although canned food is nutritious and delicious, don't forget your balanced diet. Don't give up these fresh foods when vegetables and fruits are very rich in season; If you are not so busy, you should always cook some meals for yourself and your family to warm your stomach and family. 2. Eat the unsealed tuna as soon as possible. "Supermarket winners" have the habit of buying branded food in large packages, which is both worry-free and cost-effective, and may not be a good thing. Canned food can be preserved at room temperature when it is unopened, but once it is opened, it is as easy to deteriorate as other foods. If you open a can and don't finish it, be sure to put it in the refrigerator as soon as possible. Don't think that food in cans can be kept sterile without packaging.