利用分治策略求解时，所需时间取决于分解后子问题的个数、子问题的规模大小等因素，而二分法，由于其划分的简单和均匀的特点，是经常采用的一种有效的方法，例如二分法检索。-When solving using the divide and conquer strategy, the time required depends on the number of decomposed sub-problems, the size of sub-problems and other factors, but the dichotomy, because of its simple and uniform division characteristics, is often used as a valid methods, such as binary search.