string(287) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=100%E9%A6%96%E7%AB%A5%E8%B0%A3%E6%AD%8C%E8%AF%8D%E5%A4%A7%E5%85%A8%E5%9B%BE%E7%89%87%E4%B8%8B%E8%BD%BD%E5%85%8D%E8%B4%B9 => Failed to connect to 101.89.120.29 port 38104: Connection refused"
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