根据短文意思和所给首字母，写出一个完整正确的单词。
Every minute of the day someone somewhere needs blood, maybe a s       baby, or
someone’s mum or dad_, so it is not just for emergencies and a        They need blood tohelp them beat diseases like cancer_, or do a planned operation. And that’s w    we needpeople to give blood, 3 times a year if you can. If you are in good health, b        the ages of17 and 59 and weigh at least 50kg, you can startg     blood now. And when you act,you’11 see how easy it is lo save someone’s life.