string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%B5%E8%A7%86%E7%9B%92%E5%AD%90%E6%8E%A5%E6%94%B6%E4%BF%A1%E5%8F%B7%E5%BC%BA%E5%BC%B1 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
电视盒子接收信号强弱
