Key points(do not need to make the following choices. N/A, not associated. NB NC ND, are for passing the Chao Xing software requirement.) The causes (pathogenesis) of malnutrition in children. How to make a diagnosis of malnutrion? The sequence of the locations where the thickness of abdomenal subcutaneous fat starts to decrease in children with malnutrition. What are the spontaneous hypoglycemia of malnutrition. The characters of different stages of vitamin D deficiency rickets. Causes of tickets of vitamin D deficiency. The steps for rescuing tetany of vitamin D deficiency. What is the most common clinical manifestation of tetany of vitamin D deficiency?