4 . 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; 94) 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.

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.

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.

8 . Do you love holidays, but hate the increase in weight that follows? You are not alone. Holidays are time for splendid meals and celebrating, especially with the traditional cultural foods.

With proper planning, though, it is possible to keep normal weight during the holidays. The idea is to enjoy the holidays and think about moderation(节制). Whether it is celebrating at the office party or sitting down for the traditional family dinner, regard eating as a time for tasting a variety of foods. Here are some tips to carry you through the round of celebrations and your social calendar without feeling having done wrong.

Set some goals that you can reach. Unless you have special needs to go on a diet, there are no forbidden foods. Don’t turn down the foods you enjoy, but be sensible.

Before you leave home, have a small, low fat meal or a snack. This can help you to avoid eating or drinking much. Use a small size plate and avoid the large ones that may encourage you to “load up”. You should be most comfortable eating an amount of food about the size of your fist. Once you have had your “tasting” serving, move away from the dining room. Doing so will make it easy to stop yourself eating constantly at the sight of food.

Eat slowly and fill up beforehand with clear soup and raw fruit or vegetables and fruit in a yogurt dressing rather than cream and cheese sauces. You can also drink a large glass of water before you eat to help you feel full.

If you have a sweet tooth, try mints, hard candies, and fruit. These don’t have the fat content of creamy desserts and chocolate.

Avoid high fat foods as soon as possible. Dishes that look oil y or creamy may have a generous amount of fat. Choose lean meats. Fill your plate with salad and green vegetables.

Don’t let exercise take a break during the holidays. A 20 minute walk after a meal can help burn off extra calories.

9 . That artificial food dyes (染料) are unhealthy is not news. Some are known to cause hyperactivity (多动症) in some children, affecting their ability to learn. But regulatory agencies (监管机构) around the world don’t necessarily agree on which food dyes are a problem, or why. That may soon change. A 2021 peer-reviewed report by California’s Office of Environmental Health Hazard Assessment concluded that artificial food dyes “cause or worsen neurobehavioral (神经行为的) problems in some children” and that the current levels that are regarded safe for consumption by the federal government are too high.

California is now considering requiring warning labels on food products and dietary supplements containing the seven most commonly used artificial dyes. The warning label requirement would put California on par with the European Union, which since 2010 has required food products containing certain artificial food dyes to carry warning labels about their negative effect on activity and attention in children.

Artificial dyes are used in foods for one reason: to make products look prettier. Bright colors make candies appealing, especially to kids. But dyes are also in chocolate cake mixes, salad dressings and other products that don’t seem to cry out for a color boost.

In Europe, it was the 2010 label lawmaking that triggered (引发) companies’ decisions to reformulate. “If you’re a company, you do not want to put a warning label on your product.” says Lefferts, an environmental health consultant. Warning labels are why European Starburst Fruit Chews are now colored with natural products, not the artificial dyes that brighten their North American counterparts (同类商品).

Given that artificial food dyes are used far more than needed, we need to be more cautious. After all, we don’t dye fresh fruits and vegetables, but we do dye candy and sprinkles, points out Joe Schwarcz, a chemistry professor at McGill University in Montreal. “The foods in which you find food dyes are foods that are poor in nutrition,” he says. “If you limit foods that contain food dyes, you automatically make your diet better.”