n.利他主义，利他，无私

Altruism is the selfless concern for the well-being of others, often at the expense of one's own interests.
His acts of kindness were a true display of altruism, as he consistently helped those in need without expecting anything in return.
She decided to donate her time and money to the local charity, embodying the spirit of altruism.
The altruistic teacher spent countless hours tutoring students after school, showing genuine concern for their education.
Many volunteers joined the disaster relief efforts, demonstrating altruism by putting the needs of others before their own comfort.
Companies that practice corporate social responsibility exhibit altruism by investing in sustainable initiatives and community development.
In the animal kingdom, altruistic behaviors like grooming or sharing food can be observed among species, even when it doesn't directly benefit the individual.
Altruism isn't limited to humans; some animals have been observed assisting injured members of their own species, an act of selflessness.
Her philanthropic foundation supports various causes, reflecting her strong commitment to altruism and making a positive impact on society.
The altruistic principle encourages people to act with kindness and generosity, fostering a sense of unity and compassion within communities.
第1-10句分别阐述了无私利他主义的概念、无私帮助他人的行为、慈善捐赠、教师的奉献、志愿者行动、企业社会责任、动物界的互助行为、动物界的无私、慈善基金会的作用以及无私原则对社区的影响。