前胸壁持续性钝痛，局部明显压痛多见于（）。
A.肋软骨炎
B.心包炎
C.主动脉夹层动脉瘤
D.食管炎
E.肋间神经痛
参考答案：A
在期货市场价位剧烈波动的情况下，会员或客户的保证金不能满足交易所规定的要求时会被强行平仓，如会员或客户的平仓亏损大于其现有的保证金总额，就会出现（）。
A.建仓
B.减仓
C.爆仓
D.持仓
A client on prolonged bed rest has developed a pressure ulcer. The wound shows no signs of healing even though the client has received skin care and has been turned every 2 hours. Which factor is most likely responsible for the failure to heal
A．Inadequate vitamin D intake.
B．Inadequate protein intake.
C．Inadequate massaging of the affected area.
D．Low calcium level.
