取得此区域与第二个矩形组合时的交集区域。
Gets the area of intersection for the region when combined with the second rectangle.
请注意，第二个矩形中不与该区域交集的区域色彩为蓝色。
Notice that the area of the second rectangle that does not intersect with the region is colored blue.
请注意，第二个矩形中不与该区域交集的区域色彩为蓝色。
Notice that the area of the second rectangle that does not intersect with the region is colored blue.
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