起搏标测的制约因素有（）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32356' and id < 2571640 and id<>'2571640' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32356' and id > 2571640 and id<>'2571640' order by id asc limit 5