string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BE%AE%E4%BF%A1%E5%A5%BD%E5%8F%8B%E8%BE%85%E5%8A%A9%E8%A7%A3%E5%B0%81%E6%9C%89%E6%97%B6%E9%97%B4%E9%99%90%E5%88%B6%E5%90%97 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
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