词数:754阅读难度:★★★★☆建议阅读时间:9分钟MANY people have been making the case that Americans have grown fat because they eat too much starch and sugar,and not enough meat,fat and eggs.Recently,the Dietary Guidelines Advisory Committee lifted recommendations that consumption of dietary Word Count: 754 Reading Difficulty: ★★★★ ☆ Suggested Reading Time: 9 minutes MANY people have been making the case that Americans have grown fat because they eat too much starch and sugar, and not enough meat, fat and eggs.Recently, the Dietary Guidelines Advisory Committee lifted recommendations that consumption of dietary