string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B0%8F%E5%B0%8F%E5%B8%9D%E5%9B%BD%E6%B4%BB%E5%8A%A8%E9%A1%BA%E5%BA%8F => Failed to connect to 101.89.117.144 port 38017: Connection refused"
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