string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%A1%AC%E7%9B%98%E5%9D%8F%E9%81%93%E6%A3%80%E6%B5%8B%E5%8E%9F%E7%90%86 => Failed to connect to 101.89.159.206 port 38187: Connection refused"
硬盘坏道检测原理
