治疗下肾盏小于2 公分的肾结石，请问下列那种治疗方式是最适当的选择(First of choice)： (A) 药物治疗. (B) 开放式手术(Open surgery).
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了解每个框架的优缺点可帮助您根据自己的需求作出最适当的选择，并在投入生产前了解潜在的问题区域。
Knowing the strengths and weaknesses of each framework can help you make the best choice for your needs and alert you to potential problem areas before you find them in production.
许多开发人员希望有自由为他们的系统选择最适当的持久性策略，他们不想被命令使用什么现有的数据库。
Many developers want the freedom to choose the most appropriate persistence strategy for their system; they don't want to be told what existing database to use.
对于多个索引，每个索引都针对特定目的而定制，您可以选择最适当的索引来优化搜索结果。
With multiple indexes, each tuned for a specific purpose, you can choose the most appropriate index to optimize search results.
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