观察是思维的“外壳”.因此,要想思维得好,一定要善于观察.数学家在解决或发现问题时往往首先依赖于他对若干数学现象的观察-通过观察,如果发现某种值得注意的模型或规律时,他就对它进行研究,并力图从中发现某种法则、某种公式,去解释或描述这种模型,以求问题的顺利解决.例如,建强同学经过正确计算,得到下面一组 Observation is the “shell” of thinking. Therefore, to think well, one must be good at observing. When a mathematician solves or finds a problem, he firstly depends on his observation of several mathematical phenomena—through observation, if something is noticed. When he studied the model or law, he studied it and tried to find out some rules and some formulas to explain or describe this model in order to solve the problem smoothly. For example, Jianqiang students correctly calculated and obtained The next group