Implement standard OOP features like private constructors, abstract methods and classes.

实现标准的面向对象功能，比如：私有构造函数、抽象方法和抽象类等。

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Healthcare workers caring for patients with suspected or confirmed RVF should implement Standard Precautions when handling specimens from patients.

照料疑似或确诊的裂谷热患者的卫生保健工作者，在处理从患者身上提取的标本时应当执行《标准预防措施》。

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Healthcare workers caring for patients with suspected or confirmed RVF should implement Standard Precautions when handling specimens from patients.

照料疑似或确诊的裂谷热患者的卫生保健工作者，在处理从患者身上提取的标本时应当执行《标准预防措施》。

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