To answer the first part of your question, I'd like to say that our studies were very extensive.
你问题的第一部分,我要说的就是我们的研究非常广泛。
My friend, Hugh, has always been fat, but things got so bad recently that he decided to go on a diet.
我的朋友休一直很胖,但是近来情况变得越发糟糕,以致他决定节食。