https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-001-structure-and-interpretation-of-computer-programs-spring-2005/index.htm

https://github.com/DeathKing/Learning-SICP

https://mitpress.mit.edu/sites/default/files/sicp/index.html

https://www.bilibili.com/video/BV1Xx41117tr?from=search&seid=14983483066585274454

https://stackoverflow.com/questions/14130878/sicp-2-16-interval-arithmetic-scheme

http://wiki.drewhess.com/wiki/SICP_exercise_2.16

https://en.wikipedia.org/wiki/Interval_arithmetic#Dependency_problem

https://zhuanlan.zhihu.com/p/45914836

https://zhuanlan.zhihu.com/p/102913021

1. 矩形左上角和右下角。
2. 矩阵左上角和长宽。

#### 2.16(p65)

https://stackoverflow.com/questions/14130878/sicp-2-16-interval-arithmetic-scheme

http://wiki.drewhess.com/wiki/SICP_exercise_2.16

https://en.wikipedia.org/wiki/Interval_arithmetic#Dependency_problem

https://zhuanlan.zhihu.com/p/45914836

https://zhuanlan.zhihu.com/p/102913021

1. 求$f(x_1,\ldots,x_n)$的极值点。
2. 利用蒙特卡洛模拟的方法计算。

2.6，2.15，2.16

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