text: The analysis of the above issues is as follows: 
          First, compared with other document elements, the effective pixels occupied by Title in the whole document page are small, causing the model to have errors in the positioning of Title; 
          Second, List and Text have a similar presentation in the document, causing confusion between the model's recognition of List and Text; 
          Third, the size and type of Table are complex, and the texture of different types of Table varies greatly, which increases the difficulty of model identification.