string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%94%B6%E6%8B%BE%E6%95%B0%E6%8D%AE%E7%BA%BF%E7%9A%84%E5%B0%8F%E7%AA%8D%E9%97%A8 => Failed to connect to 14.18.117.71 port 38220: Connection refused"
收拾数据线的小窍门
