根据《关于城镇医药卫生体制改革的指导意见》，把医院的门诊药房改为药品零售企业，独立核算，照章纳税，要解决的主要问题是

A．医疗服务价格

B．医疗机构药品采购方式

C．以药养医

D．药品价格过高

E．药品招标采购

—Why don't you go to Chongqing by plane?

—Going by bus doesn't cost as ______ as by plane. [ ]

A. many

B. much

C. more