string(232) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=u%E7%9B%98%E6%A0%BC%E5%BC%8F%E5%8C%96%E7%9A%84%E5%90%8E%E6%9E%9C => Failed to connect to 101.89.159.206 port 38187: Connection refused"
u盘格式化的后果
