＿＿＿buy your ticket from a ticket machine. There are lots of people there.

A．Not

B．not too

C．Don’t

D．Don’t to

护士在巡回过程中发现某患者静脉输液突然发生溶液不滴，该护士首先应采取的措施为

A．调整针头斜面

B．抬高输液瓶

C．穿刺部位热敷

D．挤压输液管

E．观察穿刺部位有无红肿及疼痛