女性，35岁。近半年反复发热伴双手关节肿痛，甲周红斑，双下肢紫癜，实验室检查示血小板减少，尿蛋白阳性，补体降低。为明确诊断，最有意义的检查是

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='29197' and id < 2375701 and id<>'2375701' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29197' and id > 2375701 and id<>'2375701' order by id asc limit 5