从规则到例子的学习实质上是一种（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31704' and id < 2537867 and id<>'2537867' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31704' and id > 2537867 and id<>'2537867' order by id asc limit 5