Keeping just one node in memory might seem to be an extreme reaction to the problem of memory limitations. Local beam search keeps track of:在内存中仅保存一个节点似乎是对内存限制问题的极端反应。局部束搜索保持：

A.k states rather than just one.k个状态而不仅仅为一

B.m states rather than n states.m个状态而不是n个

C.just one rather than k states.仅有一个状态而不是k个

D.just m states rather than n states仅有n状态而不是m

正确答案：k states rather than just one.k个状态而不仅仅为一