D. Obese mice's ability to move is affected by the inactivity of DR2

9. The underlined word "exaggerated" in Paragraph 7 can be replaced by "_____"

A. underestimated B. excluded C. overlooked D. overemphasized

10. According to Vicki Vicki-Viera-Potter, _________.

A. Alexxai Kravitz's team misread the results of the research

B. the total loss of movement can do harm to the function of DR2

C. besides diet, other factors behind obesity shouldn't be ignored in daily life.

D. obesity is mainly caused by high-fat diet people take.

When Charles Lee handed me the small red notebook in 1974, he changed my life. "While you are traveling, you should keep note of things you see and do," he explained.

I was 20 years old, a junior in college, spending a term at the University of London. Charles was a retired traveling salesman. I was staying with him in his cottage in Kendal, located in the Lake District of northern England. It was a one-week homestay the university arranged for us before classes began.

I took his advice. I wrote in the notebook every day during the homestay. Back in London, I recorded weekend trips to Wales, Yorkshire, France, and Spain. I commented on my classes, professors, and classmates. I contrasted my life at a small college in the US with my wandering through the streets of London, my introduction to life in a big city, and my initial travels outside the US. I tracked ideas I had about my life and my future.

When I wrote in the notebook, I struggled with a sense of my audience and purpose. Who would read this? Were these writing just for me, or did I want others to read them? Was I recording events and ideas just as a prompt(提示) to memory, or was there some larger purpose for this daily exercise?

I knew I was recording events, thoughts, words that were important to my life. I imagined a future me sitting down to read the pages. I wondered what it would feel like to read those words later. I wondered where I would be and what my life would be like.

I filled the notebook Charles gave me. I bought a new one and filled it. Then another and another. I continued writing in notebooks for four decades. By that time, they filled two boxes in my garage.

I had reread some of the journals. Specific volumes had provided me with the background I needed for dozens of articles for magazines. But I had never read them all. Recently, I decided to bring my collection of notebooks into my office and replay my life. As I opened the first box, I suddenly became nervous: would I like the former me described on those pages? There was a risk in opening that first notebook. I did it anyway.

Charles had been right. I remembered the big events and the central happenings, but on each page were many details I hadn't retained.

The pages revealed highlights from college classes and stories about roommates and friends. I read anxious comments I'd written as I'd launched my teaching career, learned to write lesson plans, assigned grades for student work, and solved discipline problems. I reflected on my coming marriage, then the wedding, and eventually the proud moments when I held each of my three girls as a father. I recounted more trips -returning to Europe, teaching in South America, going on safari(游猎) in Africa, and exploring Greenland. I relived memories of trail hit, rivers crossed, and