从选项A-L中选择合适的选项填空。 A. aspirin B. twice C. longer D. lives E. importance F. medical G. enough H. hero I. checked J. infectious K. doctors L. diseases World Blood Donor Day Every year on 14 June, people from all over the world celebrate World Blood Donor Day (WBDD). It is to raise awareness of the 1________for safe blood and to thank blood donors. It can help patients suffering from life-threatening conditions live 2________and with higher quality of life. In many countries, there is not 3________ supply of safe blood. How to collect safe blood? Blood donors should not take 4________or antibiotics 48 hours before donation. Health-care professionals must ask donors about their 5________history and health. Donor’s vital signs will be 6________and a blood sample for anemia will be collected. Do not allow a donor to give blood 7________within 8 weeks. Remember to test blood for 8________disease, including HIV, hepatitis B and others. Many blood donor save 9________everyday through their blood donations. Every blood donor is a 10________.