diff --git a/source/measurementDataManager.cpp b/source/measurementDataManager.cpp
index 750f74c..188fa7b 100644
--- a/source/measurementDataManager.cpp
+++ b/source/measurementDataManager.cpp
@@ -21,7 +21,7 @@ MeasurementDataManager* MeasurementDataManager::instance()
     // static MeasurementDataManager instance;
     // return &instance;
 
-    //不采用静态局部变量的方式实现，因为QTimer析构时需要依赖事件循环，静态局部变量的释放实在main函数之后，此时事件循环已退出(app.exec())
+    //不采用静态局部变量的方式实现，因为QTimer(WebSocketClient中)析构时需要依赖事件循环，静态局部变量的释放实在main函数之后，此时事件循环已退出(app.exec())
     //所以增加destroyInstance()，在main函数退出之前显示调用，即可规避此问题
     if(!m_instance)
         m_instance = new MeasurementDataManager();
@@ -294,6 +294,8 @@ void MeasurementDataManager::processHistoricalResponse(const QString& dataID, co
         {
             QJsonArray valueArray = values.toArray();
             int size = valueArray.size();
+            QVector<MeasurementDataPoint> points;
+            points.reserve(size);
             for(int i = 0; i < size; ++i)
             {
                 if(!valueArray.at(i).isObject())
@@ -302,6 +304,7 @@ void MeasurementDataManager::processHistoricalResponse(const QString& dataID, co
                 QJsonObject valueObj = valueArray.at(i).toObject();
                 qint64 timeStamp = valueObj.value("time").toString().toLongLong();
                 double value = dataObj.value("value").toDouble();
+                points.append(MeasurementDataPoint(timeStamp, value));
             }
         }
     }