【名词&注释】
营养物质(nutrient)、矿物质(mineral)、原发性骨质疏松症(primary osteoporosis)、胆囊炎(cholecystitis)、糖耐量试验(glucose tolerance test)、继发性(secondary)、胃肠功能紊乱(gastrointestinal dysfunction)、基础能量消耗(basal energy expenditure)、老年性骨质疏松症(senile osteoporosis)、总能量消耗(total energy expenditure)
[单选题]基础能量消耗(basal energy expenditure)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%