假如你是李华,你的美国笔友steven来信说他最近身体不佳,给他回信。要求...答:Dear Steven,I'm sorry to have learned that you are in poor health,but this situation can be easily changed if you take my advice.First, you should eat more vegetables, fruit, eat less meat and carbohydrate food. Second, doing exercise every day. Third, change the bad habit,...