说明：  一个可以截取屏幕任意坐标的矩形区域只需要输入 矩形的左上角坐标 和右下角坐标-an interception arbitrary screen coordinates of the rectangular region only need to import rectangular coordinates of the upper left and lower right coordinates
(One can intercept screen, the coordinates of an arbitrary rectangular area only need to enter the top left corner of the rectangle coordinates and lower right coordinates-an interception arbitrary screen coordinates of the rectangular region only need to import rectangular coordinates of the upper left and lower right coordinates)