Range object represents a contiguous area in a document, and is defined by a starting character position and an ending character position.

对象表示文档中的一个连续的区域，由一个起始字符位置和一个结束字符位置定义。

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Range object represents a contiguous area in a document, and is defined by a starting character position and an ending character position.

对象表示文档中的一个连续的区域，由一个起始字符位置和一个结束字符位置定义。

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