[Bug]: Some PDF files lost the content.

[YannSuper]

Is there an existing issue for the same bug?

• [X] I have checked the existing issues.

Branch name

main

Commit ID

c3b2a1

Other environment information

部分pdf文件解析缺少内容

Actual behavior

部分pdf文件解析缺少内容

Expected behavior

部分pdf文件解析缺少内容

Steps to reproduce

部分pdf文件解析缺少内容

Additional information

部分pdf文件解析缺少内容 第五册 1-50页[4].pdf 有的页缺少标题 ，比如海蛇药酒 那一页，还有Qiongyu Gao ，， Jiangfan Wan 我在解析文件的时候使用的Presentation 方式

[YannSuper]

还有一个问题解析之后 处方哪里丢失了很多内容，麻烦看一下

[KevinHuSh]

My suggestion is that adjust task size and chunk size.

[YannSuper]

The effect of this file is poor when General is used, so the Presentation used is better, but there are still some individual errors