string(237) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=oppo%E6%89%8B%E6%9C%BA%E6%9C%80%E6%96%B0%E6%AC%BEoppo%E6%89%8B%E6%9C%BA => Failed to connect to 61.171.74.35 port 38027: Connection refused"
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