Please reason step by step, and put your final answer within \boxed{}.
A trapezoid was drawn on the board; within it, a midline \(EF\) was constructed, and a perpendicular \(OK\) was dropped from point \(O\) (the intersection of the diagonals) to the larger base. Then the trapezoid was erased. How can the drawing be restored using the remaining segments \(EF\) and \(OK\)?
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