女性，45岁。发热、咳脓痰1周，胸片右下背段浸润阴影。用青霉素治疗体温稍下降，但痰量增多，为脓血痰，有臭味。胸片大片浸润阴影中出现空腔

治疗2周后，患者临床症状明显改善，胸片空腔缩小，抗生素总疗程一般宜持续

A．2周

B．3周

C．4周

D．8周

A fundamental tenet of modern quality management holds that quality is most likely to be achieved by ______ .

A．planning it into the project

B．developing careful mechanisms to inspect for quality

C．striving to do the best job possible

D．conducting quality circle activities