diff --git a/Easy2D/Object/RectNode.cpp b/Easy2D/Object/RectNode.cpp
index a4c6465d..795c7a8c 100644
--- a/Easy2D/Object/RectNode.cpp
+++ b/Easy2D/Object/RectNode.cpp
@@ -12,7 +12,8 @@ RectNode::~RectNode()
 
 bool RectNode::isCollisionWith(RectNode * rectNode) const
 {
-	return IntersectRect(NULL, &m_Rect, &rectNode->m_Rect);
+	static CRect rt;
+	return IntersectRect(&rt, &m_Rect, &rectNode->m_Rect);
 }
 
 bool RectNode::isPointIn(CPoint p) const
diff --git a/Easy2D/Object/Sprite.cpp b/Easy2D/Object/Sprite.cpp
index 0daf260d..620d8a1c 100644
--- a/Easy2D/Object/Sprite.cpp
+++ b/Easy2D/Object/Sprite.cpp
@@ -60,7 +60,8 @@ void Sprite::setImage(Image * image)
 
 bool Sprite::isCollisionWith(Sprite * sprite)
 {
-	return IntersectRect(new CRect(), &getRect(), &sprite->getRect());
+	static CRect rt;
+	return IntersectRect(&rt, &getRect(), &sprite->getRect());
 }
 
 void Sprite::addAction(Action * action)
diff --git a/Easy2D/easy2d.h b/Easy2D/easy2d.h
index 214a6300..e39313bf 100644
--- a/Easy2D/easy2d.h
+++ b/Easy2D/easy2d.h
@@ -564,6 +564,19 @@ public:
 	// 清空所有子节点
 	void clearAllChildren();
 
+	// 设置节点横坐标
+	virtual void setX(int x) override;
+	// 设置节点纵坐标
+	virtual void setY(int y) override;
+	// 设置节点坐标
+	virtual void setPos(int x, int y) override;
+	// 设置节点坐标
+	virtual void setPos(CPoint p) override;
+	// 移动节点
+	virtual void move(int x, int y) override;
+	// 移动节点
+	virtual void move(CVector v) override;
+
 protected:
 	std::vector<Node*> m_vChildren;
 
@@ -598,33 +611,58 @@ public:
 	RectNode();
 	~RectNode();
 
+	// 判断两节点是否碰撞
 	virtual bool isCollisionWith(RectNode * rectNode) const;
+	// 判断点是否在节点内
 	virtual bool isPointIn(CPoint p) const;
 
-	virtual void setWindowCenterX();
-	virtual void setWindowCenterY();
+	// 设置节点在窗口居中
 	virtual void setWindowCenter();
+	// 设置节点在窗口横向居中
+	virtual void setWindowCenterX();
+	// 设置节点在窗口纵向居中
+	virtual void setWindowCenterY();
 
+	// 获取节点横坐标
 	virtual int getX() const override;
+	// 获取节点纵坐标
 	virtual int getY() const override;
+	// 获取节点坐标
 	virtual CPoint getPos() const override;
+	// 获取节点宽度
 	virtual int getWidth() const;
+	// 获取节点高度
 	virtual int getHeight() const;
+	// 获取节点大小
 	virtual CSize getSize() const;
+	// 获取节点所在的矩形
 	virtual CRect getRect() const;
 
+	// 设置节点横坐标
 	virtual void setX(int x) override;
+	// 设置节点纵坐标
 	virtual void setY(int y) override;
+	// 设置节点坐标
 	virtual void setPos(int x, int y) override;
+	// 设置节点坐标
 	virtual void setPos(CPoint p) override;
+	// 移动节点
 	virtual void move(int x, int y) override;
+	// 移动节点
 	virtual void move(CVector v) override;
+	// 设置节点宽度
 	virtual void setWidth(int width);
+	// 设置节点高度
 	virtual void setHeight(int height);
+	// 设置节点大小
 	virtual void setSize(int width, int height);
+	// 设置节点大小
 	virtual void setSize(CSize size);
+	// 设置节点所在的矩形
 	virtual void setRect(int x1, int y1, int x2, int y2);
+	// 设置节点所在的矩形
 	virtual void setRect(CPoint leftTop, CPoint rightBottom);
+	// 设置节点所在的矩形
 	virtual void setRect(CRect rect);
 
 protected: