string(312) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8C%96%E5%A6%86%E5%93%81%E4%BB%A3%E7%90%86%E7%BD%91%E5%85%8D%E8%B4%B9%E6%8B%BF%E8%B4%A7%E5%8F%AF%E9%9D%A0%E5%90%97%E5%AE%89%E5%85%A8%E5%90%97 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
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