Nutrition: Compared with pear, the protein content of orange is 9 times that of pear, the calcium content is 5 times that of pear, the phosphorus content is 55 times that of pear, the content of vitamin B1 is 8 times that of pear, the content of vitamin B2 is 3 times that of pear, the content of niacin is 15 times that of pear, and the content of vitamin C is 10 times that of pear, which can be said to be rich in nutrition. Oranges also contain malic acid, citric acid, succinic acid, carotene, pectin, glucose and so on. Medicinal effects: oranges are rich in vitamin C and citric acid, can beauty and eliminate fatigue. Regular consumption of oranges can reduce the probability of coronary heart disease, hypertension, diabetes, gout. Orange peel glycosides can strengthen the capillary toughness, lower blood pressure and expand the coronary arteries of the heart.