As shown in the picture, the product description and nutrient composition table provided on the outer packaging box of a yogurt, students had a free nutritious breakfast in the morning. Analysis answer: (1 (1), when we buy food, we pay attention to the production date and shelf life, which is helpful to judge whether the food we buy exceeds the shelf life and meets the requirements of food safety. Paying attention to manufacturers helps us to know whether the products we buy are produced by regular manufacturers. Paying attention to the quality and safety signs helps us to know whether the products are safe, qualified and meet the food safety requirements. Paying attention to the types of additives will help us to know whether the additives are safe and useful.

(2) The human body needs few inorganic salts, but they have great effects. Inorganic salts containing calcium and iron can promote the normal growth and development of teenagers. Children with calcium deficiency are prone to rickets, middle-aged and elderly people and women are prone to osteoporosis, and iron deficiency is prone to anemia.

(3) protein was first digested in human stomach, and the final product of digestion was amino acid, which was absorbed into human blood circulation in small intestine.

(4) In September 2008, there were many cases of urinary calculi in infants in Gansu and other places. The survey found that most babies have a history of eating Sanlu infant formula. After investigation by relevant departments, Sanlu infant formula milk powder produced by Shijiazhuang Sanlu Group Co., Ltd. was contaminated by melamine. Melamine is a chemical raw material. Adding it to milk powder can improve the protein detection value in food. )

So the answer is: (1) production date; Shelf life; additive

(2) inorganic salts; rachitis

(3) stomach; small intestine

(4) protein