【名词&注释】
营养素(nutrient)、基础能量消耗(basal energy expenditure)、能量需要量(energy requirement)、总能量消耗(total energy expenditure)
[单选题]基础能量消耗约占全天总能量消耗(total energy expenditure)的
A. 20%~30% B. 30%~40% C. 40%~50% D. 60%~70% E. 80%~90%