老师，您好，为什么我程序的出不来图？ . sysuse auto,clear (1978 Automobile Data) . hist price (bin=8, start=3291, width=1576.875) . graph export "C:\Users\Administrator.USER-20181107EO\Desktop\Graph.png", as(png) replace (note: file C:\Users\Administrator.USER-20181107EO\Desktop\Graph.png not found) (file C:\Users\Administrator.USER-20181107EO\Desktop\Graph.png written in PNG format)