静脉血标本采集时，红色管、紫色管、蓝色管应充分摇混均匀，来回颠倒5-8次。（ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30938' and id < 2490341 and id<>'2490341' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30938' and id > 2490341 and id<>'2490341' order by id asc limit 5