医源性尿路感染的常见原因是（）
A.尿常规
B.尿培养
C.导尿
D.血培养
E.静脉肾盂造影
参考答案：C
患者男，24岁。工作时不慎扭伤踝关节，半小时后来院就诊，正确的处理方法（）
A.冷敷
B.热敷
C.冷热交替使用
D.热水足浴
E.局部按摩
In enterprises, the gateway is the computer that (67) the traffic from a workstation to the outside network that is serving the Web pages. In homes, the gateway is the (68) that connects the user to the internet.
A．TCP
B．ISP
C．FTP
D．IIS
