下列情形中属于医疗技术事故的是（）

A.由于难以预料的原因造成病员死亡

B.因技术不熟练，术中误伤大血管造成病员大出血死亡

C.无法避免造成死亡

D.无法避免造成残废

E.由于难以预料的原因造成残废

根据短文内容及首字母提示完成短文。（每空一词）

Friends play an important part in our lives. We may have many friends, but we often don’t understand c   71  how we make friends. We may get on well with a n   72   of people, but we usually make friends with a very few of them.

People use the word "friend" freely. Friends may k   73 each other since childhood or they may recently meet. In fact, people many have different k   74  of friends such as school friends, work friends, or sports friends. A person may c   75   different friends for different activities. If you play with s   76  on the playground, the person is your playmate. If you often play chess w   77  a friend, the person is your chess partner.

One may have many good friends and only one best friend. " Best friends" or "close friends" are u   78  two people who have known each other for a long time. A close friend is someone who is able to s   79  experience, joys and sorrows(悲伤) with you. This is a person you can rely on (信赖) when you are in n   80  , and this is the person to whom you are willing to lend a helping hand.

Friendship is one of life’s greatest treasure.