A multigravid client in active labor is about to deliver. The nurse has no help immediately available. What should the nurse do first

A. Prepare a clean area on which to deliver the neonate.
B. Lower the head of the bed to a flat position.
C. Have the client push with a contraction.
D. Ask the client to take a deep breath and hold it.

男性，50岁，肝炎病史20余年。近2个月来出现右侧季肋部持续胀痛，伴厌食、乏力和腹胀。查体：右侧肋缘下可触及到肿大的肝脏，质地坚硬，边缘不规则；AFP＞1000g/L。

有确定诊断意义的检查是

A．CT

B．MRI

C．肝功能检查

D．选择性肝动脉造影

E．肝穿刺针吸细胞学检查