请注意，和处理请求一样，返回到请求程序的响应在语义上等同于原始响应，不过语法略有不同。
Note that as with the request, the response returned to the requester is semantically equivalent to the original response, even though the syntax is a bit different.
这可确保返回到原始请求程序的响应与实际提供程序返回的响应在语义上匹配。
This ensures the response returned to the original requester semantically matches that returned by the actual provider.
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