肺癌

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　据了解，肺癌分小细胞肺癌和鳞癌、腺癌、大细胞癌等，我国鳞癌发病较多，这种癌与吸烟有很大关系。而欧美国家随着戒烟人数的增加，鳞癌正在逐渐减少。
　　由于肺癌的形成期约为半年，专家建议吸烟指数超过400的40岁以上人群，每半年拍一次胸片，年龄大于50岁的烟民，应每年做全面体检。对于肺癌高发地区或有肺癌家族史的烟民，建议做低剂量螺旋CT筛查，以便发现肺癌的早期“苗头”。
　　将平均每天的吸烟根数乘以吸烟年份，即是吸烟指数。吸烟指数超过400的人，即是肺癌高危人群。专家建议，肺癌高危人群最好每半年拍次胸片。
　　如果你每天平均吸20支烟，已有20年的吸烟史，那么你的吸烟指数就是400。如果每天吸30支，已有15 年的吸烟史，吸烟指数就是450。医学界把吸烟指数超过400的人列为发生肺癌的“高危人群”。
　　专家介绍，肺癌高危人群进入40岁后患肺癌的几率增加，该科收治的肺癌患者大多是40—70岁，且70%—80%都是老烟民，不少人吸烟指数都高达1000以上。

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==== 汉译英 ====

It is understood that sub-small-cell lung cancer, lung cancer and squamous cell carcinoma, adenocarcinoma, large cell carcinoma, squamous cell carcinoma of China's more, this has a lot to cancer and smoking. The United States and Europe with the increase in the number of smoking cessation, squamous cell carcinoma is being gradually reduced.
Since the formation of lung cancer of about half a year, experts suggest that smoking index of more than 400 people over the age of 40, making a chest X-ray every six months, smokers older than 50 years old, should do a comprehensive physical examination every year. For lung cancer, high-risk area or have a family history of lung cancer, smokers, suggested a low-dose spiral CT screening to detect lung cancer early "signs."
The average root number per day multiplied by smoking years of smoking, that is, smoking index. Smoking index of more than 400 people, that is at high risk of lung cancer. Experts suggest that lung cancer at high risk times the best half-yearly chest X-ray film.
If you smoke 20 cigarettes a day, on average, more than 20 years of smoking history, then your smoking index was 400. If you smoke 30 a day, for 15 years, smoking history, smoking index was 450. The medical profession to more than 400 people smoking index of lung cancer as a "high-risk groups."
According to experts, lung cancer, high-risk groups into the 40-year-old troubles increased risk of lung cancer, lung cancer patients treated in the Section are mostly 40-70 years old, and 70% -80% are habitual smokers, many people smoking index were up more than 1000 .