最新报道:78-year-old author and entrepreneur Jim Donovan, who has written over 175 books, shares his four key rules for maintaining mental sharpness: continuous learning, physical exercise, social engagement, and a structured routine. Donovan emphasizes the importance of reading daily, staying physically active with activities like walking, maintaining strong social connections, and adhering to a disciplined schedule. His methods highlight how lifelong habits can sustain cognitive health and productivity well into older age.