块语句减少了当控制结构嵌套时候可能引起的混淆，提供了一种提高代码可读性的组织机制。

Block statements reduce the ambiguity that often arises when control constructs are nested, and they provide a mechanism for organizing the code for improved readability.

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结构化异常处理是一种控制结构，它包含异常、已隔离的代码块和用于创建异常处理机制的筛选器。

Structured exception handling is a control structure that contains exceptions, isolated blocks of code, and filters to create an exception-handling mechanism.

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