Objective to investigate operation indication and therapeutic method of partial cholecystectomy in difficult cases of routine cholecystectomy.

目的探讨对常规胆囊切除术困难病例行胆囊部分切除手术的适应症及治疗方法。

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The traditional technique of lumbar puncture in myelography may have a relatively low success rate and USES much more time in difficult cases.

利用传统的腰椎穿刺方式来处理某些困难的个案时，成功率通常较低，也常耗费较多的时间。

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Conclusion LBT is a sensitive and specific test for diagnosis of SLE. The high positive predictive value of LBT in SLE suggests that it is valuable in difficult cases of SLE.

结论LBT是SLE辅助诊断的敏感和特异的指标，而其较高的阳性预测值提示其在SLE疑难病例诊断中有重要价值。

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Why is it difficult in some cases to produce a vaccine when we've been successful in so many others?

为什么某些疾病的疫苗很难研制,即使我们已经成功生产了很多种疫苗

耶鲁公开课 - 生物医学工程探索课程节选

Tests on more than 2, 000 children in several African countries reveal that Lapdap cures significantly more malaria cases than pyri-methamine-sulfadoxine and can help in difficult cases where the latter fails.

FORBES: A cure for neglect

In online physician communities such as Sermo and WebMD, doctors can reach out to colleagues for help in difficult cases, and in patient communities such as PatientsLikeMe and CureTogether, patients can share information about their symptoms.

FORBES: How To Get The Right Diagnosis For Free

The ability to enumerate business losses is often difficult in privacy cases, which has made it difficult in the past for people to demonstrate they should receive monetary compensation.

WSJ: Woman in Petraeus Matter Files Lawsuit