开始段落
in this day and age ,it is standard practice for --to --.
however,when it comes to --,people hold divergent views.
some argue that--
some believe that--
personally ,i think both these two views have merits
主体段
granted,there is --
first,second ,thirdly
主体段
however,there is
first,second,thirdly
结尾段
in the final analysis,i concede that
however
on balance,i am convinced that