string(234) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=xls%E4%BF%9D%E5%AD%98%E5%90%8E%E6%A0%BC%E5%BC%8F%E5%8F%98%E4%BA%86 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
xls保存后格式变了
