外感头痛的致病因素以何种为主(  )。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25922' and id < 2175635 and id<>'2175635' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25922' and id > 2175635 and id<>'2175635' order by id asc limit 5