string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E5%86%8C%E7%9B%91%E7%90%86%E5%8D%8F%E4%BC%9A%E7%BD%91%E7%AB%99 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
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