当我更年轻、更理想主义时，我以为我能解决世界上所有的问题。

When I was younger and more ___idealistic, I thought I could solve all the world's problems.

她以对环境问题的理想主义态度而闻名。

She is known for her ___idealistic approach to environmental issues.

他的理想主义信念经常与政治的残酷现实发生冲突。

His ___idealistic beliefs often clash with the harsh realities of politics.