string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%99%AA%E9%9F%B3%E6%B1%A1%E6%9F%93%E8%B6%85%E8%BF%87%E5%A4%9A%E5%B0%91 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
噪音污染超过多少
