作为万能理由的第一条，expand one's horizons 绝对是不二之选。究其本意，单数的horizon 是“地平线、海平线”的意思，但复数的horizons 却指人们的“眼界、视野”，其英文注释为：The limit of your ideas, knowledge and experience. 略举一例：World history is a course of study that will broaden your horizons.
先看一个具体话题：
Should the government help to build more museums and theaters?
Yes, I think the government should help to build more recreational facilities.
Enrich citizens' cultural life
expand young people's horizons
have a place to go for fun on weekends
art exhibitions can improve public taste
再来看一个抽象话题：Describe the most important decision in your life. 面对此类抽象话题，最佳策略是将其具体化，变成一个日常生活话题，然后套用 我们的万能理由。
请看思路：
I think I made the most important decision in my life by choosing to go to an overseas university after graduation from high school in China.
而其中的一条主干理由就是：
It would broaden my horizons. 比如: Broaden my horizons
made friends with people from different backgrounds
travelled a lot around Europe and North America
visited various museums and historical places
作为主干理由的 broaden my horizons，之下又 made friends, travelled a lot, visited various museums 等三条分支理由，思路极易展开。
万能理由之二： Learn
我们可以 learn skills, 也可以 learn lessons 或从某个experience 里面去learn，成为某种learning experience.
很多情况下，knowledge 和 skills 是不分家的：比如Which of the following has more influence on you: newspaper, TV or teacher? 媒体类的newspaper 或TV 固然好讲，但teacher 无疑是最佳的选择，因为teacher 直接跟learning 挂钩：
Teachers have more influence on me.
Pass on me knowledge and skills:
attending class is the only effective way of learning
knowledge not found in textbooks can be acquired
learn practical skills in addition to academic knowledge
类似的解题思路还体现在：
People who attend college will be more successful in career than those who don't.
显然，这是必须同意的命题：
Yes, it is generally true that attending college can increase the chance of career success.
Learn a lot of vital skills and gain knowledge:
academic knowledge helps to lay a solid foundation
reading and writing skills are vital to career success
having good presentation skills ensures promotion
三条分支理由中比较好的表达有：
lay a solid foundation, be vital to career success, ensure promotion. 分支理由越详细越好。Learn 作为万能理由我们可以正反面的充分论述观点，十分实用的论点。
万能理由之三：Money, finance & economy
很多话题都可以从经济的角度入手来回答。先来一道经典例题：The most important decision in your life.
思路如下：
Going to an overseas university
Achieve my independence
started to live on my own
learned a lot of practical skills such as cooking
became financially independent through a part-time job
如果我们选择 going to an overseas university作为答案， 其中的一条主干理由就是 achieve my independence， 而在所有的independence 之中，financial independence 无疑是最直接、最现成、最有说服力的一种。简单说，就是通过在国外打工，earn money and make a living.
有些题目属于一眼就看穿思路的，如：Living alone vs. sharing rooms with other people.
Sharing rooms with other people is a better choice.
Sharing rooms is more affordable:
rental fee is relatively high for an average student
sharing rooms can ease their financial burden
other living expenses can also be shared
在这个回答中，我们可以学习到很多跟钱相关的表达方式：affordable, rental fee, ease financial burden. 说穿了就是save money, reduce costs 的意思。
