2019-2020年牛津譯林版高中英語選修七Unit 2Fit for life文化背景There is no way for a healthy diet which works for everyone, but scientists know a lot about what causes illnesses like heart disease and diabetes(糖尿病).Learning about plans like the Healthy Diet Pyramid(金字塔)can help to avoid these illnesses. The Healthy Diet Pyramid is just a guide to what is good to eat and what is not. It suggests the correct bination of foods you can eat each day to get the number of calories and nutrients you need.Foods can be split into four major groups and ideally we should eat some from each group on a daily basis. The ones we should eat least are at the top of the Healthy Diet Pyramid and these are oils, fats, sugar and salt.Next are foods which e mostly from animals: meat, poultry(禽肉), fish, eggs, yoghurt, cheese. These foods are rich in protein, calcium, iron and zinc(鋅).The third level of the pyramid contains vegetables and fruits. Many people need to eat more of these than they do now, because they supply essential vitamins(維他命), minerals(礦物質(zhì)) and fibre(纖維). At the very bottom of the pyramid and in the largest group of foods are those which e from grains: rice, noodles, cereals(谷類食物) and pasta(意大利面食). These foods should be the largest part of the foods you eat each day because they provide an important source of energy, as well as vitamins, minerals and fibre.You may think that foods which e from grains are fattening, but in fact it is the way you cook them that is fattening. You should have between five and seven servings of grain foods a day. Fruit and vegetables should be eaten at least twice a day; meat and other proteins two to three times a day.Some extra tips: trim the fat off meat and broil, roast, stew or grill it rather than fry; try to eat a low amount of egg yoke(蛋黃) which is high in cholesterol(膽固醇) use egg white to increase quantity. Nuts and seeds contain a lot of fat, so try not to overeat these. All of them are food for thought!Help:split v. to separate into different parts or groups ideally adv. used to describe the way you would like things to be, even though this may not be possible trim v. to remove sth. or reduce sth. by cutting food for thought; sth. that makes you think carefully. Healthy Diet Pyramid