[名词解释] 上臂围(armcircumference)

生理性体重下降(physiologicallossofbodyweight) 身长(高)(height) 小脑扁桃体下疝是指扁桃体下端变尖呈楔形，且至少低于枕骨大孔水平以下() ["A．3mm","B．4mm","C．5mm","D．7mm","E．10mm"] 胸围(chestcircumference) 头围(headcircumference) 上臂围(armcircumference)