1岁以内小儿基础代谢所需的能量为
A.60kcal/(kg·d)
B.70kcal/(kg·d)
C.80kcal/(kg·d)
D.30kcal/(kg·d)
E.40kcal/(kg·d)
请帮忙给出正确答案和分析,谢谢!