Dr.Williams提出不要在硬膜外间隙放置异物(比如明胶海绵),是因为那里很可能会成为瘢痕组织形成的窝巢。(Dr. Williams proposed not to place foreign objects (such as gelatin sponges) in the epidural space because they are likely to become a nest formed by scar tissue.)

A. 对
B. 错