随着我国经济的迅速发展，居民的生活条件和消费水平显著提高，儿童的营养状况不断改善，生长发育速度加快，但是营养不良、营养摄取不合理状况仍然存在。目前，中小学生普遍存在着偏食、挑食、厌食等情况。如有的学生只爱吃肉、蛋而不吃蔬菜、水果；有的在家养成吃零食的习惯? With the rapid economic development in our country, the living conditions and consumption levels of residents have been significantly raised. The nutritional status of children has been continuously improved and their growth and development speed have been accelerated. However, malnutrition and irrational intake of nutrients still exist. At present, the prevalence of primary and secondary school eclipse, picky eaters, anorexia and so on. If some students only love to eat meat, eggs and not eat vegetables, fruits; some at home to develop the habit of eating snacks?