如图所示的凸透镜，若把它用在书写投影仪上，则物体应放的位置为（　　）

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    Mr Brown's horse was lost at night. All of his friends were very ____ to hear that and came to see him together. After ____（听） his story, one of them said, “Why didn't you close the door of the stable(马厩) last night?” “You aren't a deaf man”, the second said. “Didn't you ____anything at that moment? The thief(小偷) must ____(赶走) the horse away out of the gate, and couldn't carry it on ____ back.” “I agree with you,” said the third man. “How ____(careful) you are! Every evening before I ____ to bed, I lock my stable first and put the key in my box. Why didn't you do so?”The more they said, the ____excited they became. At last Mr Brown couldn't stand any more and said ____(angry), “None of you would help me look for my horse or catch the thief. Do you think that it's all my fault(错误）?____ don't you blame(责备) the thief?”

在数列$\left\{a_n\right\}$中，$a_1=2$，$2a_{n+1}=2a_n+1$，则$a_{101}$的值为  （    ）