All the following tools and techniques are helpful to accurately confirming customers' needs, except （）.

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30329' and id < 2452250 and id<>'2452250' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30329' and id > 2452250 and id<>'2452250' order by id asc limit 5