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。
I realized that they would be very worried, but that they would trust our good sense, wherever we were.
我想他们会很担心,但是无论我们在什么地方,他们都会相信我们的处事能力。