本文还讨论了该病的致病原因和预防措施。

This paper also discussed the pathogenic factors and protective measures.

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在澳洲，吸烟是可避免的单一致死致病原因。

Smoking is the largest single preventable cause of death and disease in Australia.

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医生从未知道真正的致病原因，但最后还是把它归结为超负荷的免疫系统不能再支撑我的身体。

Doctors never really knew what causes it, but finally put it down to an overloaded immune system.

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