当查询性能中出现例外情况时，优化指南和统计视图特性对于弥补访问计划估计的不准确性非常有用。

Optimization guidelines and statistical views are useful features to compensate the access plan evaluations when exceptions in query performance occur.

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研究小组之间应加强合作，更好地理解指南中关于研究设计的建议，以便在不断增加的死因推断研究中获得更好的死亡率统计数字。

Better uptake of design recommendations through enhanced collaboration between research teams is likely to produce better mortality statistics from an increasing number of verbal autopsy studies.

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但是使用这两个特性时要谨慎，因为对于优化指南，需要额外的查询匹配开销，而对于统计视图，又有编译方面的开销。

They should be considered carefully, as there is an associated cost of query matching for guidelines, or compilation for statistical views.

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