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Stratifying risk in asymptomatic patient with severe valvular heart disease .

无症状的严重心脏瓣膜病患者的危险分层。

Via fashion accessories , mobile phones and now cars , brand choices are stratifying a hitherto communist society .

通过时尚服饰、手机、如今还有汽车，品牌选择正让这个迄今仍然姓“社”的社会分出阶层。

Conclusion - : d-dimer levels may be useful in risk stratifying patients with suspected aortic dissection to rule out aortic dissection if used within the first 24 hours after symptom onset .

结论：在发病最初的24小时内检测d-二聚体水平可以用于对可疑动脉夹层患者进行危险分层和排除诊断。