阅读理解。Sometimespeoplearenotclearaboutwhatkindoffoodishealthyandwhatkindoffoodmaydoharmtoourhealth.TheUSDAhaspreparedafoodguidetohelppeoplelearnaboutwhichkindoffoodisthehealthiestto

　　阅读理解。

　　Sometimes people are not clear about what kind of food is healthy and what kind of food may do

　　harm to our health. The USDA has prepared a food guide to help people learn about which kind of food

　　is the healthiestto eat. The food guide describes six main food groups: meat (like fish and chicken)

　　dairy (like milk and cheese) grains (like bread and rice) fruit and vegetables. The last group is fats and

　　sweets. The USDA also suggests how much of each food group is healthy to eat daily. Though this

　　guide was prepared by the US government it is very useful for people all over the world.

　　(1) As a result of years of study we know that too much animal fat is bad for our health. For

　　example Americans eat a lot of meat and only a small amount (量) of grains fruit and vegetables.

　　Because of the way they eat they have a high rate (率) of cancer and heart disease. In Japan

　　people eat large amounts of grains and very little meat. The Japanese also have a very low rate of

　　cancer and heart disease. The Japanese live longer than anyone else in the world. However when

　　Japanese people move to the US the rate of heart disease and cancer goes up as their eating habit

　　changes. And as hamburgers ice creams and other high-fat foods become popular in Japan the rate

　　of heart disease and cancer is going up there as well. (2) People are also eating more meat and

　　dairy food in other countries. In those countries the disease rate is going up with the change of people's

　　eatinghabit. Doctors everywhere suggest people eat more grains fruit and vegetables and less meat

　　and dairy food.

　　(3) Eating healthily is important for children as well as their parents. When parents have poor eating

　　habits their children usually dotoo. After all children eat the same way as their parents. When parents

　　eat healt