phpexcel风格不适用整张纸

I am creating a excel using phpexcel library on the row I am applying some style like

$objPHPExcel->getActiveSheet()
    ->getStyle('A'.$row.':Q'.$row)
    ->getFont()
    ->setSize(14); ,
$objPHPExcel->getActiveSheet()
    ->getStyle('A'.$row.':Q'.$row)
    ->getAlignment()
    ->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER); 

it is applying some top 3 to 4 pages but rest of pages this formatting is not applied kindly guide any one how i solve this problem this is very important for me.

can u please try this?

$objPHPExcel->getDefaultStyle()->getFont()->setName('Times New Roman');
$objPHPExcel->getDefaultStyle()->getFont()->setSize(10);