diff --git a/src/main/java/com/aiclient/controller/MainController.java b/src/main/java/com/aiclient/controller/MainController.java
index 0c5ee91..b767607 100644
--- a/src/main/java/com/aiclient/controller/MainController.java
+++ b/src/main/java/com/aiclient/controller/MainController.java
@@ -141,10 +141,10 @@ public class MainController {
             modelSelector.getValue(),
             chunk -> {
                 // 在JavaFX线程中更新UI
-//                contentBuilder.append(chunk);
+                contentBuilder.append(chunk);
                 javafx.application.Platform.runLater(() -> {
                     assistantMessage.setContent(contentBuilder.toString());
-                    updateMessage(textArea, chunk);
+                    updateMessage(textArea, contentBuilder.toString()  );
                 });
             },
             () -> {
@@ -203,12 +203,7 @@ public class MainController {
     }
     
     private void updateMessage(TextArea textArea, String content) {
-        if (!textArea.getText().isEmpty()){
-            textArea.appendText(content);
-        }else {
-            textArea.setText(content);
-        }
-
+        textArea.setText(content);
     }
     
     private void loadChat(Chat chat) {