（摘自2017 BRK Annual Letter)：
投坛的同学，有钱无法投房的时候，是否可以学习巴菲特，持有小公司呢？
In our search for new stand-alone businesses, the key qualities we seek are:
1. durable competitive strengths; (competetive advantage)
2. able and high-grade management; (management)
3. good returns on the net tangible assets required to operate the business; (ROA)
4. opportunities for internal growth at attractive returns; (int growth oppy)
5. A sensible purchase price. (attractive price)
共勉励！
