郑州当兵视力标准郑州成人斜视手术费用,郑州高度近视会失明吗,郑州医院查近视多少钱,郑州眼睛多少度可以做手术,郑州省医眼科医院,郑州做近视眼什么仪器最好,郑州近视二三百度能治疗吗

BEIJING, Dec. 11 (Xinhua) -- China is faced with severe challenges in collecting enough blood plasma to produce medicines, Health Minister Chen Zhu said Sunday.Chen called on the public to join blood donation after donating blood plasma at the Beijing Red Cross Blood Center on Sunday, the fifth time since he took office in 2007.Blood plasma is needed to make blood products like prothrombin complex which is vital for hemophiliacs.The total volume of blood plasma collected last year was 4,180 tonnes, while the volume needed to produce enough medicines was 8,000 tonnes, said a statement from the ministry. The situation became even worse this year.Donations of blood plasma in China fell dramatically in recent years, as a result of safety concerns from donors and the government's efforts to regulate blood collection after contamination triggered HIV infection scandals.In an overhaul of plasma collection services in 2004, the ministry closed 262 donation centers, leaving only 138 in operation, resulting in the plasma donations falling at least one-third from 5,000 tonnes in 2003.Blood plasma are currently collected at 144 designed stations across the mainland. The stations, as requested by law, are all owned by major manufacturers of blood products.Chen promised to encourage qualified drug makers to set up more collection stations in the next five years.He also assured the public the safety of blood donation at authorized stations.

WASHINGTON, Nov. 9 (Xinhua) -- An international team of researchers funded by NASA and the National Science Foundation (NSF) will travel next month to one of Antarctica's most active, remote and harsh spots to determine how changes in the waters circulating under an active ice sheet are causing a glacier to accelerate and drain into the sea, the U.S. space agency announced Wednesday.The science expedition will be the most extensive ever deployed to Pine Island Glacier. It is the area of the ice-covered continent that concerns scientists most because of its potential to cause a rapid rise in sea level. Satellite measurements have shown this area is losing ice and surrounding glaciers are thinning, raising the possibility the ice could flow rapidly out to sea.The multidisciplinary group of 13 scientists, led by Robert Bindschadler, emeritus glaciologist of NASA's Goddard Space Flight Center, will depart from the McMurdo Station in Antarctica in mid- December and spend six weeks on the ice shelf. During their stay, they will use a combination of traditional tools and sophisticated new oceanographic instruments to measure the shape of the cavity underneath the ice shelf and determine how streams of warm ocean water enter it, move toward the very bottom of the glacier and melt its underbelly."The project aims to determine the underlying causes behind why Pine Island Glacier has begun to flow more rapidly and discharge more ice into the ocean," said Scott Borg, director of NSF's Division of Antarctic Sciences, the group that coordinates all U.S. research in Antarctica. "This could have a significant impact on global sea-level rise over the coming century."

RIO DE JANEIRO, Dec 15 (Xinhua) -- Brazilian President Dilma Rousseff Thursday signed a law banning smoking in public spaces and tobacco advertising at sale places in his country.Smoking in all enclosed public spaces, defined as free access areas used simultaneously by several people, is forbidden in the new law.It also prohibits tobacco advertising such as posters or banners at sale places. Previously the ban was only imposed on TV, radio and billboards advertising.In addition, the law increases the taxes and establishes minimum prices over the tobacco products to discourage buyers, therefore the cigarettes prices are expected to increase 20 percent in 2012 and 55 percent by 2015.Health warnings are also required on both sides of cigarette packs to alert consumers about the consequences of their smoking habit.The law is welcomed by some anti-smoking groups."In addition to protecting the health of its citizens, Brazil has also set an example for the world," said Matthew Myer, president of Campaign for Tobacco-Free Kids.

WASHINGTON, Dec. 21 (Xinhua) -- NASA's Dawn spacecraft has sent around 10,000 pictures of the giant asteroid Vesta back to Earth for the first time since its launch in 2007, the U.S. space agency announced Wednesday.The images were taken from an average altitude of 209 km, the closest the spacecraft can get.From the images, scientists could see Vesta's stippled and lumpy surface in great detail, and its many small craters, grooves, and lineaments. The fine scale of the images highlights small outcrops of bright and dark material.With these new discoveries, scientists believe that studying Vesta can help decode the early history of the solar system.Dawn will maintain its low-altitude orbit for another 10 weeks before moving to a higher orbit for another round of photo-taking.Launched in 2007, the 446 million U.S. dollar project aims at studying the chemical composition of Vesta's surface and probing its interior structure.Dawn will leave Vesta in July next year and arrive at the dwarf planet Ceres in February 2015.

RIYADH, Jan. 14 (Xinhua) -- China and Saudi Arabia pledged to work together to further expand all-around exchanges and cooperation as Chinese Premier Wen Jiabao Saturday unfolded his official visit to the Middle East kingdom.China and Saudi Arabia have treated each other as equals with respect and their cooperation has been fruitful since the establishment of diplomatic ties 22 years ago, said Wen while meeting Crown Prince Nayef bin Abdulaziz Al Saud.In recent years, despite the fact that international and regional situation became ever complicated and volatile, the two countries have strengthened high-level exchanges and promoted political mutual trust, said Wen, adding that the two have always demonstrated mutual understanding and support on issues involving their core interests and of major concern.Chinese Premier Wen Jiabao (L) holds talks with Saudi Arabia's Crown Prince Nayef bin Abdulaziz Al Saud in Riyadh, Saudi Arabia, Jan. 14, 2012.The premier said the decision to lift bilateral ties to an even higher level has shown the two nations' firm commitment to jointly face challenges and protect common interests as the world situation is undergoing profound changes.China would like to work with the Saudi side in deepening exchanges and cooperation in various aspects so as to benefit the two peoples and promote world peace and development, Wen added.He said the two sides should expand trade of crude oil and natural gas and energy-related cooperation as to deepen their energy partnership.Wen also asked the two countries to promote investment cooperation. The Chinese government encourages well-established Chinese companies to participate in Saudi Arabia's infrastructure construction such as railway, sea ports, electricity and telecommunications, he said.The two nations could also enhance security and law enforcement cooperation and promote people-to-people exchanges in areas like education and sports, as well as between the two nations' youths.Nayef said Saudi Arabia and China enjoy a time-honored history of exchanges, adding that the Saudi people have friendly feelings toward the Chinese people and expect even better bilateral ties.With joint efforts, bilateral ties have moved forward continuously with remarkable achievements in bilateral cooperation, he said, added that the partnership has bright prospects.Nayef said Saudi Arabia is willing to further boost political mutual trust with China, expand bilateral cooperation in economy and trade, energy, infrastructure, culture, press, and security, promote friendship between the two peoples, and lift bilateral ties to a higher level.Wen arrived here on Saturday evening after a short official visit to Nepal on the same day.