2. Economic pressure: College students face high tuition and living expenses, as well as debt burden. These economic pressures may make them pay more attention to their own interests and livelihoods and alienate themselves from social and other affairs.
3. Busy lifestyle: College students usually have to face heavy course burdens, internships, part-time jobs and other activities. They may be busy with various tasks and responsibilities, and they don't have enough time and energy to interact with society.
4. The influence of technology and social media: The development of technology and the popularity of social media have changed people's social ways. College students may prefer to keep in touch with others through social media rather than face-to-face interaction. This virtual communication may lead to an increase in the sense of distance between people.
5. Social changes and cultural factors: Social changes such as the change of social values, the rise of individualism and the increase of mobility may lead college students to pay more attention to personal interests and self-realization, while reducing their concern and mutual assistance to others.
It should be pointed out that these are only some possible explanations, which are not applicable to all college students. Individual differences and diversity make everyone have different experiences and expressions. Therefore, we can't classify all college students as indifferent, and we can't simply summarize their behavior.