refine log format (#312)

### What problem does this PR solve?

Issue link:#264
### Type of change


- [x] Documentation Update
- [x] Refactoring

rag/app/book.py

@@ -110,7 +110,7 @@ def chunk(filename, binary=None, from_page=0, to_page=100000,
         [t for t in random_choices([t for t, _ in sections], k=100)])
     if bull >= 0:
         chunks = ["\n".join(ck)
-                  for ck in hierarchical_merge(bull, sections, 3)]
+                  for ck in hierarchical_merge(bull, sections, 5)]
     else:
         sections = [s.split("@") for s, _ in sections]
         sections = [(pr[0], "@" + pr[1]) for pr in sections if len(pr) == 2]

rag/app/laws.py

@@ -133,7 +133,7 @@ def chunk(filename, binary=None, from_page=0, to_page=100000,
 
     make_colon_as_title(sections)
     bull = bullets_category(sections)
-    chunks = hierarchical_merge(bull, sections, 3)
+    chunks = hierarchical_merge(bull, sections, 5)
     if not chunks:
         callback(0.99, "No chunk parsed out.")
 

rag/llm/chat_model.py

@@ -98,7 +98,7 @@ class QWenChat(Base):
         tk_count = 0
         if response.status_code == HTTPStatus.OK:
             ans += response.output.choices[0]['message']['content']
-            tk_count += response.usage.output_tokens
+            tk_count += response.usage.total_tokens
             if response.output.choices[0].get("finish_reason", "") == "length":
                 ans += "...\nFor the content length reason, it stopped, continue?" if is_english(
                     [ans]) else "······\n由于长度的原因，回答被截断了，要继续吗？"