某地夏季暴发肠道疾病的流行，调查发现，多数患者发病日期集中在同一潜伏期内，且病例分布与供水范围一致，为了尽快控制疾病的流行，应采取的对策是（）

A.对症治疗

B.应用抗生素

C.隔离患者

D.对污染水源立即采取净化和消毒措施

E.对患者家里进行消毒

I prefer skiing to climbing because I think climbing is ______ skiing. [ ]

A. not as exciting as

B. not more exciting as

C. not most exciting as

D. more exciting than