update readme

README_CN.md

@@ -325,6 +325,8 @@ python openai_api.py
 import openai
 openai.api_base = "http://localhost:8000/v1"
 openai.api_key = "none"
+
+# 使用流式回复的请求
 for chunk in openai.ChatCompletion.create(
     model="Qwen-7B",
     messages=[
@@ -334,6 +336,16 @@ for chunk in openai.ChatCompletion.create(
 ):
     if hasattr(chunk.choices[0].delta, "content"):
         print(chunk.choices[0].delta.content, end="", flush=True)
+
+# 不使用流式回复的请求
+response = openai.ChatCompletion.create(
+    model="Qwen-7B",
+    messages=[
+        {"role": "user", "content": "你好"}
+    ],
+    stream=False
+)
+print(response.choices[0].message.content)
 ```