我国导致直接肺损伤的原因中，占首因的是(    )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26318' and id < 2201482 and id<>'2201482' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26318' and id > 2201482 and id<>'2201482' order by id asc limit 5