Risks versus benefits should also be evaluated on a case by case basis.

风险收益评估应当对于每个病例逐个进行。

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Medium risks should be evaluated to see whether they need to be proactively managed.

中等程度的风险需加以评估，以便看看是否需积极管理。

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Several studies have evaluated the various modalities for DVT prophylaxis, and comparison studies have stratified the risks and benefits for each option.

已经有研究对各种不同DVT预防方案作了评估，并有对比研究将每种方法的收益与风险作了分层分析。

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In the desire to make sure the risks are evaluated thoroughly or to reduce duplication of activity, some organizations focus significantly on checking plans with other teams.

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Under an SMS, any change in the air traffic system that could have a safety impact needs to be rigorously analyzed for hazards, the risks of those hazards thoroughly evaluated and the risks eliminated or mitigated to an acceptable level.

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These risks can only be properly evaluated by investors that have a comprehensive understanding of the risk factors they are prepared to accept when assembling their portfolio.

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