零食是什么?简单地说,就是人在一日三餐的正餐以外所吃的食物。儿童和老年人是零食最主要的消费群体,近年来,我国城市儿童、青少年和中老年人的零食消费量都呈上升趋势。在看电视、聊天、休闲的时候,人们常常会吃零食。有研究显示,部分人群零食提供的能量已占全天能量的约10%。那么,零食到底该不该吃,吃零食有哪些讲究,该怎么选、怎么吃呢? What is a snack? Simply put, people eat three meals a day outside the meal. Children and the elderly are the most important consumer groups for snacks. In recent years, the snack consumption of urban children, adolescents and middle-aged and elderly people in our country has been on the rise. When watching TV, chatting and relaxing, people often eat snacks. Studies have shown that the energy provided by snacks for some groups of people accounts for about 10% of the total energy of the day. So, the snack in the end should not eat, what are the snacks to eat, how to choose, how to eat?