How to use readtable/writetable to read and write data from/at a specified range of lines within a text file

Hello,

Suppose that we have a text file with separate blocks of headers/data, like the following text file that includes 3 blocks.

I want to read each data block into a separate table, supposing that I know the beginning and ending line of each block (for example the 2nd blocks begins in line 4 and ends in line 6). Is there a neat way to do this, using the readtable function? The same questions applies for the sequential writing of separate tables to the same text file, specifying the beginning line, within the text file, where I want to write the table.

Thank you in advance