Refactor code structure for improved readability and maintainability

data/pdf_chunks/page_4.txt

@@ -0,0 +1,37 @@
+=== 第 4 页切片结果 ===
+图片: page_4.png
+MD5: 0d28f24386def56047a5f6e6250c75ab
+文本长度: 585 字符
+切片大小: 500 字符
+切片数量: 2 个
+
+--- Chunk 0 ---
+长度: 500 字符
+内容:
+#!!$
+!!M.NOeP’.N!
+M.NQRSTUV"WX ,-!%(%(#!**#$12345YZRS%!
+M.N[ ,-!%(%(#!**#\]"^R_‘ab&
+###cde’#$( JKLM()’#$) NOP(fg/0*
+###hi ,-’’(&#"++#"j’%$! TU(k?’%$!$! V/WXYZ[\]^_(.’%$!$" ‘a’
+b(?Q,RS.5678lsemn*
+###op ,-&"*’$&$qr-0)12!st0)12%"j’%$’ ,-uv(lsemn*
+###cde’%$&$& %&ef()’%$&$’ ’()*+z’()’%$&$( JKLMef(.’%$&$)$"BC
+DKLf(wxyQ,RS"z{|d}e\~5678*
+###mne’&$!+ CNuv?r/’56(5678*
+###cde5678?’&$! 34RS("!"’&$!$! 569-()’&$!$" 56:;<f(.’&$!$#
+56=>(?34RS!
+M.N#k$%&’()*+H!
+M.N#Z$st.N‘Q,,-*./!
+M.NV012&34k%(56k7)89:,-;_<=>?k7)
+
+--- Chunk 1 ---
+长度: 85 字符
+内容:
+@AB12)-C^DE!
+M.N^RV0F&GH!)IJK)LL!
+M.NMWX.N?NOPMQRSTO&
+###,-!%(%(#!**#!
+!
+!"!"#"#!$%%&
+