string(320) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A4%9A%E5%B0%91%E5%88%86%E8%B4%9D%E4%BB%A5%E4%B8%8A%E7%9A%84%E5%99%AA%E5%A3%B0%E5%AF%B9%E4%BA%BA%E5%AE%8C%E5%85%A8%E6%B2%A1%E6%9C%89%E5%BD%B1%E5%93%8D => Failed to connect to 101.91.112.32 port 38162: Connection refused"
多少分贝以上的噪声对人完全没有影响
