首先推导了双层筒体基于最佳化设计原则的缩套界面压力的计算公式及径比条件。

First of all, the equation of shrunk interface pressure and the condition of diametrical ratio are deduced under the optimal design principle of shrunk double-layers cylinder.

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应本着患者利益最佳化的原则去善待预先指示，包括其消极指示和积极指示，以保护患者本人真实的主观意志。

We should treat advance directives, including negative and positive ones, in the best interests of patients so as to protect patient's real subjective will.

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