在选民较多，分布较广的情况下一般采用(    )

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='7820' and id < 620323 and id<>'620323' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='7820' and id > 620323 and id<>'620323' order by id asc limit 5