China is becoming richer and richer in the world. So healthy eating is      very popular topic in the country. People begin to eat in expensive restaurants and order unusual food      pleasure. People believe that, with more money in their pockets, it is absolutely reasonable to eat better and eat whatever they like. However, this is not a clever idea. Some food is harmful to human body, but people are “brave” enough to taste     . For example, some birds can cause bird flu,    can sometimes infect human. Some animals can cause SARS. People were killed when it broke out in Guangdong, China. If people are not careful enough,    will be more outbreaks of illnesses    to the wrong eating of animals.
What should we eat to keep healthy? Traditional science gives us some useful ideas about it. We      to eat the food high in protein, fiber and vitamin, but low     cholesterol （胆固醇）, sugar and salt.