He's very profound about many different things, but when it comes to his own near-death experience, he doesn't________ on it.
句意： 他对许多不同事情都有深刻见解， 但谈到自己九死一生的经历时， 却并未细想。 dwell on 细想，详述。 其他选项不与 on 搭配。 因此， 本题的正确答案为 A。