世界银行：每天一个苹果：更健康的校餐对约旦儿童的影响（英文版）

Poor nutritional choices and unhealthy behaviors are considered responsible for the rise in childhood overweight and obesity and may reinforce each other, creating a vicious cycle. This paper studies a primary school intervention designed to break the cycle early in life by replacing date bars with calorie-equivalent meals lower in sugar and fat. Leveraging the randomized pilot of a menu change in Jordan’s national school feeding program, the study shows that children consuming the alternativ