diff --git a/Easy2D/Action/EActionFrames.cpp b/Easy2D/Action/EActionFrames.cpp
index 9505c1aa..751ffab2 100644
--- a/Easy2D/Action/EActionFrames.cpp
+++ b/Easy2D/Action/EActionFrames.cpp
@@ -18,8 +18,7 @@ e2d::EActionFrames::~EActionFrames()
 {
 	for (auto frame : m_vFrames)
 	{
-		frame->autoRelease();
-		frame->release();
+		SafeRelease(&frame);
 	}
 }
 
diff --git a/Easy2D/Base/EScene.cpp b/Easy2D/Base/EScene.cpp
index bc144e5d..8c736f1b 100644
--- a/Easy2D/Base/EScene.cpp
+++ b/Easy2D/Base/EScene.cpp
@@ -7,15 +7,19 @@
 e2d::EScene::EScene()
 	: m_bWillSave(true)
 	, m_bSortNeeded(false)
-	, m_Root(new ENode())
+	, m_pRoot(new ENode())
 {
-	m_Root->_onEnter();
-	m_Root->_setParentScene(this);
+	m_pRoot->_onEnter();
+	m_pRoot->_setParentScene(this);
 }
 
 e2d::EScene::~EScene()
 {
-	m_Root->autoRelease();
+	SafeRelease(&m_pRoot);
+	ETimerManager::clearAllTimersBindedWith(this);
+	EMsgManager::clearAllMouseListenersBindedWith(this);
+	EMsgManager::clearAllKeyboardListenersBindedWith(this);
+	EActionManager::clearAllActionsBindedWith(this);
 }
 
 void e2d::EScene::onEnter()
@@ -42,7 +46,7 @@ bool e2d::EScene::onCloseWindow()
 
 void e2d::EScene::_onRender()
 {
-	m_Root->_callOn();
+	m_pRoot->_callOn();
 }
 
 void e2d::EScene::_onEnter()
@@ -63,48 +67,41 @@ void e2d::EScene::_onExit()
 		EMsgManager::_waitAllKeyboardListenersBindedWith(this);
 		EActionManager::_waitAllActionsBindedWith(this);
 	}
-	else
-	{
-		ETimerManager::clearAllTimersBindedWith(this);
-		EMsgManager::clearAllMouseListenersBindedWith(this);
-		EMsgManager::clearAllKeyboardListenersBindedWith(this);
-		EActionManager::clearAllActionsBindedWith(this);
-	}
 }
 
 void e2d::EScene::add(ENode * child, int order /* = 0 */)
 {
-	m_Root->addChild(child, order);
+	m_pRoot->addChild(child, order);
 }
 
 bool e2d::EScene::remove(ENode * child, bool release /* = false */)
 {
-	return m_Root->removeChild(child, release);
+	return m_pRoot->removeChild(child, release);
 }
 
 void e2d::EScene::remove(const EString &childName, bool release /* = false */)
 {
-	return m_Root->removeChild(childName, release);
+	return m_pRoot->removeChild(childName, release);
 }
 
 e2d::EVector<e2d::ENode*>& e2d::EScene::getChildren()
 {
-	return m_Root->m_vChildren;
+	return m_pRoot->m_vChildren;
 }
 
 size_t e2d::EScene::getChildrenCount() const
 {
-	return m_Root->getChildrenCount();
+	return m_pRoot->getChildrenCount();
 }
 
 e2d::ENode * e2d::EScene::getChild(const EString &childName)
 {
-	return m_Root->getChild(childName);
+	return m_pRoot->getChild(childName);
 }
 
 void e2d::EScene::clearAllChildren()
 {
-	m_Root->clearAllChildren();
+	m_pRoot->clearAllChildren();
 }
 
 void e2d::EScene::bindListener(EMouseListener * listener)
diff --git a/Easy2D/Msg/EMsgManager.cpp b/Easy2D/Msg/EMsgManager.cpp
index b55e9e51..8229bcea 100644
--- a/Easy2D/Msg/EMsgManager.cpp
+++ b/Easy2D/Msg/EMsgManager.cpp
@@ -252,8 +252,7 @@ void e2d::EMsgManager::delMouseListeners(const EString & name)
 	{
 		if ((*mIter)->getName() == name)
 		{
-			(*mIter)->autoRelease();
-			(*mIter)->release();
+			SafeRelease(&(*mIter));
 			mIter = s_vMouseListeners.erase(mIter);
 		}
 		else
@@ -295,8 +294,7 @@ void e2d::EMsgManager::delKeyboardListeners(const EString & name)
 	{
 		if ((*kIter)->getName() == name)
 		{
-			(*kIter)->autoRelease();
-			(*kIter)->release();
+			SafeRelease(&(*kIter));
 			kIter = s_vKeyboardListeners.erase(kIter);
 		}
 		else
@@ -433,8 +431,7 @@ void e2d::EMsgManager::clearAllMouseListenersBindedWith(EScene * pParentScene)
 		auto t = s_vMouseListeners[i];
 		if (t->getParentScene() == pParentScene)
 		{
-			t->autoRelease();
-			t->release();
+			SafeRelease(&t);
 			s_vMouseListeners.erase(s_vMouseListeners.begin() + i);
 		}
 		else
@@ -455,8 +452,7 @@ void e2d::EMsgManager::clearAllKeyboardListenersBindedWith(EScene * pParentScene
 		auto t = s_vKeyboardListeners[i];
 		if (t->getParentScene() == pParentScene)
 		{
-			t->autoRelease();
-			t->release();
+			SafeRelease(&t);
 			s_vKeyboardListeners.erase(s_vKeyboardListeners.begin() + i);
 		}
 		else
@@ -477,8 +473,7 @@ void e2d::EMsgManager::clearAllMouseListenersBindedWith(ENode * pParentNode)
 		auto t = s_vMouseListeners[i];
 		if (t->getParentNode() == pParentNode)
 		{
-			t->autoRelease();
-			t->release();
+			SafeRelease(&t);
 			s_vMouseListeners.erase(s_vMouseListeners.begin() + i);
 		}
 		else
@@ -499,8 +494,7 @@ void e2d::EMsgManager::clearAllKeyboardListenersBindedWith(ENode * pParentNode)
 		auto t = s_vKeyboardListeners[i];
 		if (t->getParentNode() == pParentNode)
 		{
-			t->autoRelease();
-			t->release();
+			SafeRelease(&t);
 			s_vKeyboardListeners.erase(s_vKeyboardListeners.begin() + i);
 		}
 		else
diff --git a/Easy2D/Tool/EActionManager.cpp b/Easy2D/Tool/EActionManager.cpp
index e9347c2f..8c70df05 100644
--- a/Easy2D/Tool/EActionManager.cpp
+++ b/Easy2D/Tool/EActionManager.cpp
@@ -100,8 +100,7 @@ void e2d::EActionManager::clearAllActionsBindedWith(ENode * pTargetNode)
 			auto a = s_vActions[i];
 			if (a->getTarget() == pTargetNode)
 			{
-				a->autoRelease();
-				a->release();
+				SafeRelease(&a);
 				s_vActions.erase(s_vActions.begin() + i);
 			}
 			else
@@ -205,8 +204,7 @@ void e2d::EActionManager::ActionProc()
 			if (action->_isEnding())
 			{
 				// 动作已经结束
-				action->autoRelease();
-				action->release();
+				SafeRelease(&action);
 				s_vActions.erase(s_vActions.begin() + i);
 			}
 			else
diff --git a/Easy2D/Tool/ETimerManager.cpp b/Easy2D/Tool/ETimerManager.cpp
index d2bb6c79..2c5ab30f 100644
--- a/Easy2D/Tool/ETimerManager.cpp
+++ b/Easy2D/Tool/ETimerManager.cpp
@@ -69,8 +69,7 @@ void e2d::ETimerManager::delTimers(const EString & name)
 	{
 		if ((*mIter)->getName() == name)
 		{
-			(*mIter)->autoRelease();
-			(*mIter)->release();
+			SafeRelease(&(*mIter));
 			mIter = s_vTimers.erase(mIter);
 		}
 		else
@@ -117,8 +116,7 @@ void e2d::ETimerManager::clearAllTimersBindedWith(EScene * pParentScene)
 		auto t = s_vTimers[i];
 		if (t->getParentScene() == pParentScene)
 		{
-			t->autoRelease();
-			t->release();
+			SafeRelease(&t);
 			s_vTimers.erase(s_vTimers.begin() + i);
 		}
 		else
@@ -169,8 +167,7 @@ void e2d::ETimerManager::clearAllTimersBindedWith(ENode * pParentNode)
 		auto t = s_vTimers[i];
 		if (t->getParentNode() == pParentNode)
 		{
-			t->autoRelease();
-			t->release();
+			SafeRelease(&t);
 			s_vTimers.erase(s_vTimers.begin() + i);
 		}
 		else
diff --git a/Easy2D/ebase.h b/Easy2D/ebase.h
index 604f54d4..11ad3fb9 100644
--- a/Easy2D/ebase.h
+++ b/Easy2D/ebase.h
@@ -88,8 +88,8 @@ public:
 
 	// 切换场景
 	static void enterScene(
-		EScene * scene,
-		bool saveCurrentScene = true
+		EScene * scene,					/* 下一个场景的指针 */
+		bool saveCurrentScene = true	/* 是否保存当前场景 */
 	);
 
 	// 返回上一场景
@@ -261,7 +261,7 @@ protected:
 protected:
 	bool m_bSortNeeded;
 	bool m_bWillSave;
-	ENode * const m_Root;
+	ENode * m_pRoot;
 };