string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E4%BC%9A%E5%AE%A1%E8%AE%A1%E9%87%91%E9%91%AB%E6%9D%BE%E7%BD%91%E8%AF%BE%E7%99%BE%E5%BA%A6%E7%BD%91%E7%9B%98 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
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