泌尿系结石首选X线检查方法是()
A．静脉肾盂造影
B．逆行肾盂造影
C．X线平片
D．膀胱造影
E．肾血管造影
参考答案：C
A. She can save up to $600 a month for her studies. B. She spends approximately $800 each month. C. She is not content with her parents for the allowance. D. She can not make both ends meet while at college.
患者男性，18岁，晨起时肌肉酸胀，翻身和起床困难。近1个月内类似发作4次，均持续数小时完全恢复。查体：双上肢肌力3级，双下肢2级，腱反射减低，病理征（-），感觉无异常。心电图示ST段压低和U波。
预防原则中不正确的为（）
A.口服螺内酯
B.口服乙酰唑胺
C.口服氢氯噻嗪
D.避免诱因
E.口服钾盐
