【正确答案】正确答案：Walden emphasizes the importance of solitude, contemplation, and closeness to nature in transcending the "desperate" existence that, he argues, is the lot of most people. The book is not a traditional autobiography, but combines autobiography with a social critique of contemporary Western culture"s consumerist and materialist attitudes and its distance from and destruction of nature. Besides, it is not simply a criticism of society, but also an attempt to engage creatively with the better aspects of contemporary culture, is suggested both by Thoreau"s proximity to Concord society and by his admiration for classical literature. There are signs of ambiguity, or an attempt to see an alternative side of something common.

【答案解析】解析：本题考查《瓦尔登湖》的主题思想，考生可以从超验主义的角度对该问题进行回答。