(1) The 1 floor of the "Balanced Diet Pagoda" is cereals, mainly providing sugars such as starch. Sugar is the main energy-supplying substance of human body, and most of the energy needed for various life activities of human body comes from sugar, so to meet the supply of sugar, a large proportion of cereals should be eaten in the diet; After entering the human digestive tract, sugar is preliminarily digested in the mouth, thoroughly digested into glucose in the small intestine, and absorbed into the blood circulation in the small intestine.

(2) protein is an indispensable substance in human tissues, and it is also the main component of various enzymes, antibodies and some hormones. Children and adolescents are in a critical period of growth and development, so they should eat more foods rich in protein, such as the three or four layers of food in the table, to ensure their growth and development.

So, the answer is: (1) cereal; Sugar; Small intestine;

(2) protein is more.