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Tuesday,13th September

    I arrived in New York two weeks ago.I am writing my diary(日记)in English because my English teacher Rachel says it is a good way to practise English．So far, I like New York and my school．I have three classes a day．Most of my classmates come from Japan，South Korea，Spain，Germany and Australia．There aren't many Chinese students．so I have to use English most of the time．I am learning a lot!I am living in student housing,and I have my own comfortable room．

Thursday．20th October

    My English is hopeless!I was on the bus this morning and a man spoke to me,but I couldn't understand him．I was so embarrassed(尴尬的)．Why is my English improving so slowly?I want to make lots of American friends,but this isn't happening so easily．I'm a shy girl．It is hard for me to talk to some people,even my classmates!I like them,but sometimes I can't understand them very well．I think I'm feeling homesick(想家的).I miss my friends and family．

Thursday．27th October

    I went to a school party last Friday and it was great．I talked with a Japanese boy named Kenji，a German girl named Wendy and an Italian girl named Carla．We talked about our countries' customs (风俗）and our experiences in America so far．We are going to walk around New York together this weekend．Also, Kenji wants me to write for the student newspaper here at school．Maybe things are getting better!

根据材料内容选择最佳答案。

除去下列各组物质中的杂质，所用试剂和方法均正确的是（   ）

已知$x>1$，$y>1$且$\frac{1}{4}\ln x$，$\frac{1}{4}$，$\ln y$成等比数列，则$xy$（  ）

    A drug that is used to treat serious bleeding could save thousands of lives of mothers giving birth. A world test of the drug found it reduced (降低) the risk of bleeding deaths during childbirth by nearly one third. The study included 20,000 women in 21 countries, mainly in Africa and Asia. The test was carried out by London School of Hygiene and Tropical Medicine. The drug is called tranexamic acid (凝血酸). It is low-cost and researchers said it does not cause serious side effects (副作用) for mothers or babies.

    The drug is used to treat mothers for serious bleeding during childbirth. Postpartum hemorrhage (产后出血) is the main cause of mothers' death around the world, according to the World Health Organization.

    Haleema Shakur is the project director for the test. She said though medical condition is improved in many countries, serious bleeding after childbirth remains a big problem in some parts of the world. “It's one of the biggest killers of mothers. In Africa and Asia, about 10% of women will end up with serious bleeding.” The drug works after a mother gives birth.

    Shakur said the best results were reported when the drug was given to women as soon as possible after childbirth. “The earlier you give it — within the first three hours after giving birth — the better the result is.”

    The next step will be to provide training for doctors and nurses on how to use it and then to find where the drug is needed. During the test, women were given the drug in a hospital. But researchers are looking for easier ways to use the drug so it can be more widely used in small clinics and the countryside.