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。
The Ombudsman immediately wrote to the Chief of Police in the district asking him to send a record of the case.
司法特派员立即写信给当地警察局长,请他寄送与此事有关的材料。