【名词&注释】
病理变化(pathological changes)、幼儿期(toddler age)、黄金分割(golden section)、学龄期(school age)、皮下脂肪(subcutaneous fat)、关键是、婴儿期(infancy)、健康情况(health condition)、亚急性硬化性全脑炎(subacute sclerosing panencephalitis)
[单选题]当血钙低于下列哪个数值时,可引起手足抽搐 ( )
A. 1.4mmol/L(5.5mg/dl)~1.5 mmol/L 6.0mg/dl)
B. 1.5mmol/L(6.0mg/dl)~1.63 mmol/L(6.5mg/dl)
C. 1.6mmol/L(6.5mg/dl)~1.75 mmol/L(7.0mg/dl)
D. 1.75mmol/L(7.0mg/dl)~1.88 mmol/L(7.5mg/dl)
E. 2.0mmol/L(8.0mg/dl)~2.13 mmol/L(8.5mg/dl)