短文改错。

    It is five years now since I graduate from High School Attached to Harbin Normal University. Last Saturday,

the class that I was on held a get-together, which took us a long time prepare. It was indeed not easy to get in

the touch with everybody and set a well time for all of us. We all enjoyed this precious day greatly, remember

the time we spent together and the people they were familiar with. It was a pity which some of us were not

present as they had gone to abroad for further studies. Anyway, they called back or sent greeting card from

different places.

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某地发现数百名不明原因传染性肺炎病例（后被确诊为SARS），死亡2例，危重100例，患病者以医护人员居多。

考虑为突发公共卫生事件，下列处置哪些是正确的（）

A.组织技术力量全力抢救患者

B.组织技术力量全力查找病因，集中力量开展相关的科学研究工作

C.采取卫生防护措施，防止交叉感染和污染

D.对密切接触者采取医学观察措施

E.疾病预防控制机构应当立即对可能受到危害的人员进行调查，根据需要采取必要的控制措施

F.做到早发现、早报告、早隔离、早治疗、防止扩散