合并单元格 $oe->getActiveSheet()->mergeCells("{$from_column}1:{$next_column}1") 加批注
$oe->getActiveSheet()->getComment("{$from_column}1")->getText()->createTextRun('update every day'); 设置颜色
$oe->getActiveSheet()->getStyle("$from_column$row")->getFont()->setColor(new PHPExcel_Style_Color(PHPExcel_Style_Color::COLOR_RED));