I face a large space between the start edge of the page and the section, please forgive me as I am new user for Latex.
The problem is the distance from the paper's edge to the text body is too large
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I don't know what picture you are referring to, but probably adding something like
in your preamble might help you.
1in (in = inch) to whatever you need.
Also see LaTeX/Page Layout for more info about page layout.