试述腔静脉置管术的置管途径。
参考答案：腔静脉置管术的置管途径主要包括锁骨下静脉、颈内静脉、股静脉、经外周行中心静脉（PICC）穿刺置管术。
While large numbers of residents in this area ___the A/H1N1 flu, very few suffered death.
A．picked up
B．took up
C．brought up
D．caught up
果树营养有哪些特点？
