string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BF%AB%E9%80%92%E4%B8%A2%E4%BB%B6%E8%B5%94%E5%81%BF%E8%BF%90%E8%B4%B9%E5%90%97 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
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