上消化道大量出血一般是指在数小时内失血量超过800ml。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30780' and id < 2478545 and id<>'2478545' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30780' and id > 2478545 and id<>'2478545' order by id asc limit 5