golang 里 fmt.Scanln 碰到空格就会停下来……你这还 scan 个🔨的 line 啊
https://stackoverflow.com/questions/34647039/how-to-use-fmt-scanln-read-from-a-string-separated-by-spaces/34647156
https://stackoverflow.com/questions/34647039/how-to-use-fmt-scanln-read-from-a-string-separated-by-spaces/34647156