A drug used to treat severe bleeding could save thousands of lives for mothers giving birth. A global trial of the drug found it reduced the risk of bleeding deaths during childbirth by nearly one-third. The study involved 20,000 women in 21 countries, mainly in Africa and Asia. The trial was carried out by London's School of Hygiene and Tropical Medicine. The drug is called d tranexamic acid （氨甲環(huán)酸）. It is low-cost and researchers said it does not cause serious side effects for mothers or babies.

The drug is used to treat mothers for severe bleeding during childbirth, also known as postpartum hemorrhage (產(chǎn)后出血).It is the leading cause of mother’s death worldwide, according to the World Health Organization.

Haleema Shakur is the project director of the trial. She says despite medical advances in many countries, severe 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 percent of women will end up with severe bleeding. " The drug works by stopping blood clots（血凝塊） from breaking down after a mother gives birth. The treatment can prevent the need for doctors to perform surgery to find the source of bleeding.

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- so within the first three hours of giving birth—the better the effect is. ”

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

1.Tranexamic acid is a drug that .

A. should be used for every mother

B. helps mothers before giving birth

C. ensures most new-born babies’ health

D. can help mothers giving birth stop bleeding

2.What is the reachers’next plan?

A. To know how much the drug is.

B. To get permission to use the drug.

C. To let more people know the drug.

D. To make medical staff know how to use the drug.

3.What can we learn from the text?

A. The more mothers use the drug, the better its effect is.

B. African and Asian countries made great progress in medicine.

C. There is a long way to go before the drug can be used more widely.

D. Postpartum hemorrhage is the leading cause of women’s death.

4.What may be the best title for the text?

A. Care for the Health of Mothers

B. How Can We Use Tranexamic Acid Well?

C. Childbirth Drug Greatly Reduces Bleeding Deaths

D. What's the Biggest Killer of Mothers?

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