I can't really see what else I could be doing. I'm very confused about all this. I don't quite understand what I ought to do. Well, I suppose one could be a Chichester and rush across the Atlantic in a boat. But you know, really, I'm too tired for that. I think what I want to say to people is that if you're in this situation it isn't nearly as bad as people who try and put themselves in your position think it is.

For one thing, other people come to it cold, whereas I've been doing my homework on it for the last two years. I've got used to the idea and have come to the point of acceptance gradually. The other thing is that they're feeling well and vigorous, with lots of things they're in the middle of doing. But I am actually getting very tired and don't feel very well. 

句中For one thing, other people come to it cold, it后面的形容词cold在句中做什么成分？词句中的come to是表示进入......状态吗？