?

自從日本福島核電站爆炸后，在我國大部分地區(qū)能測到微量輻射，但是專家提醒說無需擔心，不需要采取過多的防護。同時在日本周邊地區(qū)輻射水平也下降了。

點擊下載本期音頻>>

Recently, extremely low levels of radioactive isotope iodine-131 were detected in the air over the Yellow Sea and some areas of all provincial-level regions except Yunnan. Trace levels of radioactive isotope cesium-137 and -134 were detected in the air of 22 of mainland's 31 provinces and regions.

However, the detection of radioactive materials in vegetables triggered the public's concern. Minimal amounts of iodine-131 were detected in spinach planted in Beijing, Jiangsu, Zhejiang and Shandong. The radioactive isotope was found on lettuce and Chinese cabbage in Guangdong.

Zhang Wanshi, professor at the radiology department in the Air Force General Hospital in Beijing, says there is really no need to worry about the possibility of radioactive contamination. As for the current level of radioactive materials found in vegetables, just washing can effectively clean them.?

"The current levels of radioactive materials are very low, so there is no need to panic or take any precautions, plus, there is nothing you can do with it. I've heard some people take iodine pills. Taking normal iodine can prevent our hypothyroid from absorbing radioactive iodine, however, the current dose detected in many places across China is extremely low. So there is no need to take these measures unless you are in Fukushima."

Experts estimate that the dose of eating 3,500 kg of the radioactive material-affected vegetables at this level can reach the level of taking an X-Ray picture.

As a radiologist, Zhang Wanshi, has been working with radioactive materials all his life. He says there are other ways people may be exposed to a radioactive environment, like taking an X-Ray and CT scan. But the dose is limited.

"The annual radioactive receive dose for ordinary should be 1 to 3 millisievert (mSv). For people who engage in radiation related work, like radiologists, their annual dose should be no more than 20 mSv. An X-Ray picture gives about 0.02 mSv radiation. But for a CT scan it gives 6-8 mSv. So wearing lead is necessary to protect some key parts of the patient's body, like the head, hypothyroid and sex organs when they are doing a CT scan. We advocate low dose CT scanning. But this has higher demands for CT equipment."

Zhang Wanshi emphasizes there is no medicine that can effectively prevent radioactive risks. Doing regular exercise and enhance your immune system is a more practical way to deal with radioactive effects.

For CRI, I am Li Dong.

“聲明：音視頻均來自互聯(lián)網(wǎng)鏈接，僅供學習使用。本網(wǎng) 站自身不存儲、控制、修改被鏈接的內(nèi)容。"滬江英語"高度重視知識產(chǎn)權保護。當如發(fā)現(xiàn)本網(wǎng)站發(fā)布的信息包含有侵犯其著作權的鏈接內(nèi)容時，請聯(lián)系我們，我們 將依法采取措施移除相關內(nèi)容或屏蔽相關鏈接。”