进行现场调研过程中，业务人员在实地考察时必须（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25434' and id < 2142463 and id<>'2142463' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25434' and id > 2142463 and id<>'2142463' order by id asc limit 5