“民以食为天”。人类文明发展到了今天，吃饭已不再仅仅只是出于求生的本能，而更多的是为了从食物中获得合理的营养，从而使身心更加健康。食物的营养成分被称为营养素。人体所需的营养素近 50种，通常将其分为 7大类，即蛋白质、脂质、糖 (碳水化合物 )、维生素、无机盐、 “People use food as their day.” Since the development of human civilization, today, eating is no longer just for the survival of instinct, but more to obtain reasonable nutrition from food, thus making the body and mind healthier. The nutrients of food are called nutrients. The human body needs nearly 50 nutrients, usually divided into 7 categories: proteins, lipids, carbohydrates (carbohydrates), vitamins, inorganic salts,