The whole area was________by the snow, and the government had to send food there by helicopter.[ ]

A. cut away  

B. cut up

C. cut off  

D. cut down

男性，60岁，肠梗阻3天入院。查体：血压70/40mmHg，血钠125mmol/L，血钾3.2mmol/L，血气分析pH 7/31

若需要补充碱剂，如果补充碱剂过快，患者不会发生下列哪种情况

A．手足抽搐

B．神志改变

C．高钾血症

D．低钾血症

E．惊厥