这些规格随后作为输入供分析师来改进业务流程，从而完成一个循环。
These metrics then provide input to the analysts to improve the process, closing the cycle.
输出完成后，通过向客户端流写入一个 NULL 对象，而且循环等待下一个客户端，从而刷新流。
When the output is complete, the stream is flushed by writing a NULL object to the client stream and loop awaiting the next client.
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