diff --git a/utils/g2d/g2d.go b/utils/g2d/g2d.go
index 0b4322f..401b94f 100644
--- a/utils/g2d/g2d.go
+++ b/utils/g2d/g2d.go
@@ -52,6 +52,7 @@ func GetAdjacentPositionsWithContinuousPosition[T any](matrix []T, width, pos in
 }
 
 // PositionToInt 将坐标转换为二维数组的顺序位置
+//   - 需要确保x的取值范围必须小于width，或者将会得到不正确的值
 func PositionToInt(width, x, y int) int {
 	return y*width + x
 }
diff --git a/utils/g2d/g2d_test.go b/utils/g2d/g2d_test.go
index b3aa56b..dc85ed3 100644
--- a/utils/g2d/g2d_test.go
+++ b/utils/g2d/g2d_test.go
@@ -10,4 +10,7 @@ func TestPositionIntToXY(t *testing.T) {
 	fmt.Println(pos)
 	fmt.Println(PositionIntToXY(9, pos))
 
+	fmt.Println(PositionToInt(65000, 61411, 158266))
+	fmt.Println(PositionIntToXY(65000, 10287351411))
+
 }