Using mathematical models, researchers added an apple to the diet of every Brit over the age of 50—a total of 22 million adults—while keeping calorie intake constant.

研究人员们使用数学模型对2.2亿成年人中每位超过50岁英国公民的食谱中增加了一个苹果—并使他们每日摄取一定的热量。