He is doing a hard job.Work starts at 7 a.m.every day and goes on until late afternoon only              a break at midday.

A．by

B．for

C．after

D．with

男性患者，33岁，颜面部疖肿2周，近3d高热，咳嗽，咳血痰，脓性痰少量。查体：双肺散在干、湿啰音。WBC 27×10⁹/L，中性粒细胞0.92。该病人应选用的抗生素是

A．万古霉素
B．氟康唑
C．甲硝唑
D．链霉素
E．克林霉素