何为同学做实验来验证孟德尔提出的某一遗传规律，步骤如下：

①在4个白色乒乓球上分别钻个圆孔，各放入一块圆形磁铁（磁铁有南北两极，且同极相斥、异极相吸），磁铁南极露出球面，2个标上“A”，另2个标上“a”，代表卵细胞；

②将4个黄色乒乓球进行同样处理，不同的是磁铁北极露出球面，代表精子；

③将4个白球放入一个大篮子内不停摇动，使它们随机分布；

④边摇动篮子边将4个黄球同时放入篮子内；

⑤待看到4个白球分别与4个黄球两两结合（北铁异极相吸，如图）后，统计分析结果．

请回答问题．

    Today is my birthday and I'm so happy about it. ____ the morning I put a note on the table and say, "Today is ____ (I) birthday, don't forget it!" At school, I get many gifts and ____ (card) from my classmates and have a lot of fun. But I am waiting for the birthday party after school.

    It ____ (be) time to go home. I open the door, ____ there is no one in the house. There is only a note and it ____ (say), "Coming home late tonight, mum and dad." I call them but there is no answer. I am not ____ (happy). Do they forget my birthday? How can this be? I don't have fun. I have to do my homework.

    Now it is seven o'clock. The door opens. My ____ (parent) are there, with flowers and some other gifts. And I see ____ big and nice cake, too.

    You see, I ____ (have) a very good time on my birthday!

某工人因为思想麻痹，不注意落实安全生产措施，结果出了事故，手臂被割伤，伤口连续不断地流出暗红色的血液，出血量较多．这时应当采取的措施是（ ）