Refactor code structure for improved readability and maintainability

data/pdf_chunks/page_5.txt

@@ -0,0 +1,32 @@
+=== 第 5 页切片结果 ===
+图片: page_5.png
+MD5: 839a0e80672006dd66ed82a984db2f17
+文本长度: 474 字符
+切片大小: 500 字符
+切片数量: 1 个
+
+--- Chunk 0 ---
+长度: 474 字符
+内容:
+% & ’ ( ) * + , -
+!!./
+M.N&/eU3V12WXV12;Y?12345?YZQ,RS.5678!
+M.NZ[)\st345W]^)\_‘Vab??345"acd345#!
+$!0.12345
+be*+k?fghiM.N?()jkOM.N?fg!lmnUo?()*+$_pNMC
+?mn1"Z!"qr?st#WmuPvZ[)\M.N$wj$xyhiM.Nzk{|?}7~!
+m"W0)#$*+?\cPM!lmZnUo?()*+$_\cPM[)\M.N!
+,-’’(&%"++#!$%stYZQ,&$
+’!6789:
+be,-./0[)\M.N!
+’$!
+%&’()!#$%&’()%#*#&+,
+3&4’5($}54[K)?x*o~b+k3,+W-+$z./F0’BC12"4jst
+?5(!a34B[K)?x*o*k?+=O-+$45466f~p\646?37!
+’$$
+(;!()-#.
+C3hDw48?f54T9?6D$:f54[K)x*?El;<"@=!#!
+< !!)(=>?@91AB
+!
+!"!"#"#!$%%&
+