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Scientists have learned a lot about the kinds of people need. They say that there are several kinds of food that people should eat every day, they are: (1) green and yellow vegetables of all kinds; (2) citrus (柑桔) fruits and tomatoes; (3) potatoes and other fruits and vegetables; 4) meat of all kinds, fish and eggs; (5) milk and foods made from milk; (6) bread or cereal (谷类), rice is also in this kind of food; (7) butter, or something like butter.

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People in different countries and different places of the world eat different kinds of things. Foods are cooked and eaten in many different kinds of ways. People in different countries eat at different times of the day. In some places people eat once or twice a day; in other countries people eat three or four times a day. Scientists say that none of the differences is really important. It doesn’t matter whether foods are eaten raw or cooked, canned (罐装的) or frozen (冷冻的). It doesn’t matter if a person eats dinner at 4 o’clock in the afternoon or at eleven o’clock at night. The important thing is what you eat every day.

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There are two problems, then, in feeding the large number of people on the earth. The first is to find some way to feed the world’s population so that no one is hungry. The second is to make sure that people everywhere have the right kinds of food to make them grow to be strong and healthy.

Advice on Preparing a Healthy Meal for Your Pet Dog

There are many reasons to prepare your dog’s food. He might be a picky eater, or you may want to avoid giving him additives in the dog food you buy, or maybe you just want to show your dog some love. If you only make a homemade healthy meal sometimes, don’t worry too much about balancing the nutrition (营养), if you plan to feed your dog homemade meals for a long time, you’ll need to consider more about it.

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Eat According to Your Blood Type

Dr. Carle believes that the food people eat has some chemical relationships with their blood types. If people follow a diet according to their blood types, they will get more energy, become healthier, and even lose weight.

◆ Blood Type O

People with blood type O can digest (消化) meat and vegetables well. They should eat more beef, chicken, and fish if they want to lose weight. However, only eating nice and beans isn’t helpful to them at all.

◆ Blood Type A

People with blood type A should eat more fruit and vegetables if they want to lose weight. Meat isn’t digested easily in their bodies, so they should eat less meat.

◆ Blood Type B

People with blood type B should eat fewer noodles because they easily make them fat. Meat, milk and vegetables are good for them to lose weight.

◆ Blood Type AB

About 9% of the people around the world have blood type AB. The number is much smaller than types A, B, and O. It is healthier for them to eat vegetables, fruit and eggs to lose weight, but they should eat less meat. It is not easy for them to digest meat.