The old farmer has one son and two daughters, ______ are kind to her,______makes her sad.

A．neither of them; which

B．all of whom; which

C．none of them; it

D．none of whom; which

患者，68岁。因腹泻、便秘交替出现2个月就诊，大便稀并带有黏液血便，疑患“直肠癌”收住院。

如明确诊断并准备行Miles手术，错误的术前准备是()

A．术前2日进流质

B．术前1日服缓泻剂

C．术前3日口服肠道吸收的抗生素

D．术日晨3日应用维生素

E．术前3日应用给生素K