单项选择题

A.20(kcal/kg)×实际体重(kg)
B.30(kcal/kg)×实际体重(kg)
C.15(kcal/kg)×理想体重(kg)
D.20(kcal/kg)×理想体重(kg)
E.30(kcal/kg)×理想体重(kg)