I saw a question from a young man on the Internet: What should I do with my biological parents who suddenly appeared? 　　The main idea…

　　There is a saying you should have heard. The famous philosopher Isaiah Berlin said, “Hedgehog knows one big thing, and fox knows many little things.”…

　　People all over the world, regardless of income level, are already suffering from some kind of climate change. Now, I want to talk about the…