新生儿出生时的平均头围是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25669' and id < 2157379 and id<>'2157379' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25669' and id > 2157379 and id<>'2157379' order by id asc limit 5