diff --git a/astrbot/core/platform/astr_message_event.py b/astrbot/core/platform/astr_message_event.py
index 96a7ad6f1..68ab887d9 100644
--- a/astrbot/core/platform/astr_message_event.py
+++ b/astrbot/core/platform/astr_message_event.py
@@ -1,5 +1,6 @@
 import abc
 import asyncio
+import re
 from dataclasses import dataclass
 from typing import List, Union, Optional, AsyncGenerator
 
@@ -205,6 +206,20 @@ class AstrMessageEvent(abc.ABC):
         """
         return self.role == "admin"
 
+    async def process_buffer(self, buffer: str, pattern: re.Pattern) -> str:
+        """
+        将消息缓冲区中的文本按指定正则表达式分割后发送至消息平台，作为不支持流式输出平台的Fallback。
+        """
+        while True:
+            match = re.search(pattern, buffer)
+            if not match:
+                break
+            matched_text = match.group()
+            await self.send(MessageChain([Plain(matched_text)]))
+            buffer = buffer[match.end() :]
+            await asyncio.sleep(0.8)  # 限速
+        return buffer
+
     async def send_streaming(self, generator: AsyncGenerator[MessageChain, None]):
         """发送流式消息到消息平台，使用异步生成器。
         目前仅支持: telegram，qq official 私聊。
diff --git a/astrbot/core/platform/sources/aiocqhttp/aiocqhttp_message_event.py b/astrbot/core/platform/sources/aiocqhttp/aiocqhttp_message_event.py
index a798360d5..ae79a3bf4 100644
--- a/astrbot/core/platform/sources/aiocqhttp/aiocqhttp_message_event.py
+++ b/astrbot/core/platform/sources/aiocqhttp/aiocqhttp_message_event.py
@@ -1,11 +1,10 @@
 import asyncio
-from typing import AsyncGenerator, List, Dict
 import re
-
-from astrbot.api.event import AstrMessageEvent, MessageChain
-from astrbot.api.platform import Group, MessageMember
-from astrbot.api.message_components import Plain, Image, Record, At, Node, Nodes
+from typing import AsyncGenerator, Dict, List
 from aiocqhttp import CQHttp
+from astrbot.api.event import AstrMessageEvent, MessageChain
+from astrbot.api.message_components import At, Image, Node, Nodes, Plain, Record
+from astrbot.api.platform import Group, MessageMember
 
 
 class AiocqhttpMessageEvent(AstrMessageEvent):
@@ -84,17 +83,6 @@ class AiocqhttpMessageEvent(AstrMessageEvent):
 
         await super().send(message)
 
-    async def process_buffer(self, buffer: str, pattern: re.Pattern) -> str:
-        while True:
-            match = re.search(pattern, buffer)
-            if not match:
-                break
-            matched_text = match.group()
-            await self.send(MessageChain([Plain(matched_text)]))
-            buffer = buffer[match.end() :]
-            await asyncio.sleep(0.5)  # 限速
-        return buffer
-
     async def send_streaming(self, generator: AsyncGenerator):
         buffer = ""
         pattern = re.compile(r"[^。？！~…]+[。？！~…]+")
@@ -108,6 +96,7 @@ class AiocqhttpMessageEvent(AstrMessageEvent):
                             buffer = await self.process_buffer(buffer, pattern)
                     else:
                         await self.send(MessageChain(chain=[comp]))
+                        await asyncio.sleep(0.8)  # 限速
 
         if buffer.strip():
             await self.send(MessageChain([Plain(buffer)]))
diff --git a/astrbot/core/platform/sources/gewechat/gewechat_event.py b/astrbot/core/platform/sources/gewechat/gewechat_event.py
index b38f797ac..ffca8b59f 100644
--- a/astrbot/core/platform/sources/gewechat/gewechat_event.py
+++ b/astrbot/core/platform/sources/gewechat/gewechat_event.py
@@ -4,8 +4,8 @@ import wave
 import uuid
 import traceback
 import os
-from typing import AsyncGenerator
 
+from typing import AsyncGenerator
 from astrbot.core.utils.io import save_temp_img, download_file
 from astrbot.core.utils.tencent_record_helper import wav_to_tencent_silk
 from astrbot.api import logger
@@ -220,17 +220,6 @@ class GewechatPlatformEvent(AstrMessageEvent):
             members=members,
         )
 
-    async def process_buffer(self, buffer: str, pattern: re.Pattern) -> str:
-        while True:
-            match = re.search(pattern, buffer)
-            if not match:
-                break
-            matched_text = match.group()
-            await self.send(MessageChain([Plain(matched_text)]))
-            buffer = buffer[match.end() :]
-            await asyncio.sleep(0.5)  # 限速
-        return buffer
-
     async def send_streaming(self, generator: AsyncGenerator):
         buffer = ""
         pattern = re.compile(r"[^。？！~…]+[。？！~…]+")
@@ -244,6 +233,7 @@ class GewechatPlatformEvent(AstrMessageEvent):
                             buffer = await self.process_buffer(buffer, pattern)
                     else:
                         await self.send(MessageChain(chain=[comp]))
+                        await asyncio.sleep(0.8)  # 限速
 
         if buffer.strip():
             await self.send(MessageChain([Plain(buffer)]))
diff --git a/astrbot/core/platform/sources/lark/lark_event.py b/astrbot/core/platform/sources/lark/lark_event.py
index fd87f57bc..ae0d55ab7 100644
--- a/astrbot/core/platform/sources/lark/lark_event.py
+++ b/astrbot/core/platform/sources/lark/lark_event.py
@@ -94,17 +94,6 @@ class LarkMessageEvent(AstrMessageEvent):
 
         await super().send(message)
 
-    async def process_buffer(self, buffer: str, pattern: re.Pattern) -> str:
-        while True:
-            match = re.search(pattern, buffer)
-            if not match:
-                break
-            matched_text = match.group()
-            await self.send(MessageChain([Plain(matched_text)]))
-            buffer = buffer[match.end() :]
-            await asyncio.sleep(0.5)  # 限速
-        return buffer
-
     async def send_streaming(self, generator: AsyncGenerator):
         buffer = ""
         pattern = re.compile(r"[^。？！~…]+[。？！~…]+")
@@ -118,6 +107,7 @@ class LarkMessageEvent(AstrMessageEvent):
                             buffer = await self.process_buffer(buffer, pattern)
                     else:
                         await self.send(MessageChain(chain=[comp]))
+                        await asyncio.sleep(0.8)  # 限速
 
         if buffer.strip():
             await self.send(MessageChain([Plain(buffer)]))