string(241) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=u%E7%9B%98%E4%BD%8E%E6%A0%BC%E5%90%8E%E6%97%A0%E6%B3%95%E8%AF%86%E5%88%AB => Failed to connect to 101.89.159.206 port 38187: Connection refused"
u盘低格后无法识别
