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%E5%95%A5%E6%84%8F%E6%80%9D => Failed to connect to 101.89.159.206 port 38087: Connection refused"
u盘格式化啥意思
