男性，21岁，头昏，皮肤紫癜月余，近10天来，头痛，呕吐入院，查：面色苍白，全身浅表淋巴结肿大，颈略有抵抗，肝大肋下1.5cm，脾大肋下2.0cm，Hb58g/L，WBC23.0×109/L，PLT5.0×109/L，骨髓检查：增生明显活跃，原始及早幼淋巴细胞占48%，巨核细胞及血小板少见，脑脊液检查潘氏试验（+）白细胞0.02×109/L，诊断最大的可能是（）
A.急性白血病并发颅内出血
B.急性白血病并发颅内感染
C.结核性脑膜炎
D.急性淋巴细胞性白血病并发脑膜白血病
E.病毒性脑炎
参考答案：D
解析：依据患者骨髓检查增生明显活跃，原始及早幼淋巴细胞占48%，可考虑急性淋巴细胞白血病诊断，结合本例中患者存在头痛、呕吐的症状，查体颈略有抵抗，考虑急性淋巴细胞性白血病并发脑膜白血病可能性大。
Computer games are very popular. It is natural for people to want to _21___ , so playing against a computer or against a friend on the computer can be __22__to stop. “ Just one more game, ” often turns into another game, then another. Computer games do have their _23__. They are excellent for training hand or eye coordination(协调).Surgeons (外科医生)_24____played computer games as children are often skilled. Computer games can __25__ be great for teaching students. The students are open to learning while playing. They can study for longer than a teacher would be able to teach. But like anything __26__ in life, things should be balanced.(平衡).Too much time on the computer can _27__ your eyes. Regular breaks are needed. If students cannot _28__ playing computer games, they won’t do as well in other areas in their life—not just schoolwork, but in developing important social skill such as how to talk with people and how to work with others. And if they are no longer taking regular exercise, __29___ health will become worse. Computer games have their place, __30___people must also remember it is important to have a balanced lifestyle.
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