string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8C%97%E4%BA%AC%E4%BF%A1%E9%B8%BD%E5%87%BA%E5%94%AE%E7%BD%91%E7%AB%99 => Failed to connect to 101.89.117.144 port 38005: Connection refused"
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