资料题：作者举狒狒的例子是为了说明（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31506' and id < 2524781 and id<>'2524781' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31506' and id > 2524781 and id<>'2524781' order by id asc limit 5