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string(249) "get document error:https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%95%99%E5%AD%A6%E7%94%9F%E6%8B%9B%E8%81%98%E5%B9%B3%E5%8F%B0%E7%BD%91%E7%AB%99 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
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