For a country in which roughly 200 million people are overweight or obese, scientists today have discouraging news: Even those who maintain a healthy weight probably should be eating less.

• 对于一个有大约200万人超重或肥胖的国家，科学家今天的消息有点让人沮丧：即使是那些有健康体重的人或许也应少吃。