学前儿童的发展是通过（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31369' and id < 2515915 and id<>'2515915' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31369' and id > 2515915 and id<>'2515915' order by id asc limit 5