string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BA%A2%E6%9D%89%E8%B5%84%E6%9C%AC%E5%AE%98%E7%BD%91%E5%B9%B3%E5%8F%B0 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
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