In order to achieve reasonable nutrition, nutritionists in China divide foods into five categories and visually design them as "balanced diet pagodas" (see the figure below) (1).

The main nutrients contained in the foods represented by A, B, C, D and E in the balanced diet pagoda are sugar, vitamins and inorganic salts, protein and fat.

(1) Food contains six kinds of nutrients: protein, sugar, fat, vitamins, water and inorganic salts, each of which is necessary for human body. Among these nutrients, sugar is the most important energy-supplying substance for human body, and the energy consumed by all human activities, including learning, walking, digestion and breathing, mainly comes from sugar. Fat is a spare energy substance in human body.

(2) Food E is rich in sugar, which can provide energy for human body in time after eating.

(3) Good eating habits should be: three meals a day, meals on time, no partial eclipse, no picky eaters, no overeating.

(4) Calcium and phosphorus contained in inorganic salts are important components of bones and teeth, and iron is a component of hemoglobin, so iron deficiency will lead to anemia.

Therefore, the answer is: (1) inorganic salt; Vitamin; fat

（2）E； carbohydrate

（3）D

(4) anemia; hemoglobin

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