做求职者的背景调查时，原雇主可能不愿意或被禁止说任何负面的东西，所以，应发送这样的调查信息："如果您强烈认为这位求职者极其出色，请给我回邮件。" 如果他们不回复，就当作是对候选人的否定。
When checking references for a job applicant， employers may be reluctant or prohibited from saying anything negative， so leave or send a message that says， “Get back to me if you highly recommend this applicant as super great.” If they don’t reply take that as a negative.
Silence can be a form of resistance.
Never stop learning because life never stops teaching.
数学的本质不是把简单的事情复杂化，而是把复杂的事情简单化。