中小学生是处于生长发育最为关键的阶段。如果饮食不合理,营养摄入不均衡,就会出现一些营养问题,从而影响他们正常的生长发育。我国青少年膳食中热量供给已基本达到标准,但蛋白质供给量偏低,优质蛋白质比例少,钙、锌、维生素A等营养素供给明显不足。按世界卫生组织的标准,我国0 Primary and secondary students are in the most crucial stage of growth and development. If the diet is not reasonable, nutrition imbalance, there will be some nutritional problems, thus affecting their normal growth and development. China’s dietary calories have basically reached the standard, but the protein supply is low, a small proportion of high-quality protein, calcium, zinc, vitamin A and other nutrients supply significantly less. According to the standards of the World Health Organization, our country 0