How are you？I am Li Hua.__________________________________________________________________

Best wishes!

Yours sincerely,

Li Hua

   I was born in New York City. My first seven years were spent in Manhattan, and then we moved to the Bronx. As a child with a strong ___for knowledge, I went to a public school and received a good ___education there.

At the end of my high school I decided to major in science and, in particular, ___. One of the ___factors may have been that my grandfather, whom I loved dearly, died of cancer when I was 15. I was ___motivated to do something that might eventually ___a cure for this terrible disease.

With great efforts and help from my parents, I ___graduate school at New York University in 1939. I was the only female in my graduate chemistry class, and ___my Master of Science degree in chemistry in 1941.

I was doing my research into ___with other scientists. When we began to see the results of our ____in the form of new drugs which filled real ____needs and benefited patients in very ____ways, our feeling of ____was immeasurable.

Over the ____, my work became both my vocation and avocation(业余爱好). ____, I became an enthusiastic photographer and ____. I have traveled fairly widely over the world, but there still remain many places for me to explore. ____major interest is music and I am an opera lover. I also ____concerts, ballet and theater.

In my ____career I was promoted frequently, and in 1967 I was appointed Head of the Department of Experimental Therapy, a position which I ____until I retired in 1983.

   A newly-published study has shown that loneliness can spread from one person to another，like a disease. Researchers used information from the Framingham Heart Study，which began in 1948. The Framingham Heart Study gathers information about physical and mental health，personal behavior and diet. At first，the study involved（使参加）about 5,000 people in the American state of Massachusetts. Now more than 12,000 individuals（个人）are taking part.

Information from the Framingham Heart Study showed earlier that happiness can spread from person to person. So can behavior like littering and the ability to stop smoking.

Psychologist John Cacioppo，at the University of Chicago，led the recent study. He and other researchers tried to show how often people felt lonely. They found that the feeling of loneliness spread through social groups.

Having a social connection with a lonely person increased the chances that another individual would feel lonely. In fact，a friend of a lonely person was 52% more likely to develop feelings of loneliness. A friend of that person was 25%more likely. The researchers said this shows that a person could indirectly be affected by someone’s loneliness.

The effect was the strongest among friends. Neighbors were the second most affected group. The effect was weaker on husbands and wives，and brothers and sisters. The researchers also found that loneliness spread more easily among women than men.

The New York Times newspaper reported that，on average，people experience feelings of loneliness about 48 days a year. It also found that every additional（额外的）friend can decrease loneliness by about five percent，or two and a half fewer lonely days.

Loneliness has been linked to health problems like depression（抑郁症）and sleeping difficulties. The researchers believe that knowing the causes of loneliness could help reduce it.

The study suggested that people can take steps to stop the spread of loneliness. They can do this by helping individuals they know who may be experiencing loneliness. The result can be helpful to the whole social group.