string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%9A%E4%B8%BB%E8%87%AA%E5%B7%B1%E7%AE%A1%E7%90%86%E5%B0%8F%E5%8C%BA => Failed to connect to 101.89.143.195 port 38175: Connection refused"
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