关于think的几个词组辨析

辨析think about,think of,think over和think out:
这四个短语都和think有关.think about指“考虑,回想,想起”,如：He is thinking about travelling in the summer holidays.他正在考虑暑假旅游的事.She was thinking about her childhood days.她正回想她的童年时期.think of指“考虑,计及,记忆,记起”,如：You think of everything!你全都提到了.I can't think of his name at the monment.我一时想不起他的名字.think sth.over指“仔细想,审慎思考,作进一步考虑”,如：Please think over what I said.请仔细考虑我说的话.I want to think it over.我想仔细考虑一下这件事.think sth.out 指“想通,想出,熟思”,如：He thought out a new idea.他想出了一个新主意.That wants thinking out.那事需要仔细考虑.think up 意为 想出think up an idea想出主意think up=think out?