“关键期”概念的提出者是（ ）。  

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SQL Error: select id,body,options from ***_enewstiku where sourceid='23626' and id < 2055761 and id<>'2055761' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='23626' and id > 2055761 and id<>'2055761' order by id asc limit 5