说明：  该文章主要研究了依靠减治技术的各搜索算法，从基本搜索到对基本搜索改进，最后探讨了启发式的搜索，逐步深入，从而加深对搜索和减治法的理解
(The paper studies the reduction treatment technologies rely on various search algorithms, basic search to search for basic improvements, and finally discuss the heuristic search, the gradual deepening, thus deepening the search and reduce the governing law of understanding)