郑州近视一千多度能激光吗郑州准分子激光和半飞秒差别,郑州近视能参军吗,郑州眼睛近视做激光好吗,郑州做近视眼什么仪器最好,郑州眼睛里出血是怎么回事,郑州飞秒比准分子好哪些,郑州治疗近视需要多少钱

BAIKONUR, Kazakhstan, April 5 (Xinhua) -- Russia launched a spacecraft with three astronauts on board from the Kazakh Baikonur space center early on Tuesday, Xinhua correspondents reported from the site.The Soyuz TMA-21 spacecraft atop a Soyuz-FG carrier rocket blasted off at 02:18 a.m. Moscow time (2218 GMT April 4), sending to the International Space Station (ISS) Russian cosmonauts Alexander Samokutyaev and Andrei Borisenko and U.S. astronaut Ronald Garn.The Russian Soyuz TMA-21 spacecraft, named after the first cosmonaut Yuri Gagarin, carrying the International Space Station (ISS) crew of U.S. astronaut Ronald Garan, Russian cosmonauts Alexandr Samokutyaev and Andrey Borisenko, blasts off at the Baikonur cosmodrome, April 5, 2011.The Soyuz TMA-21, named after the first cosmonaut Yuri Gagarin, was scheduled to dock with the ISS at 03:18 a.m. Moscow time (2318 GMT April 6) on Thursday.According to the Russian Federal Space Agency (Roscosmos), the three new crew members are expected to spend 170 days in the ISS. During the period, they will receive two U.S. space shuttles and three Russian Progress cargo ships, conduct a spacewalk and carry out over 40 experiments.The launch is dedicated to the 50th anniversary of the first flight into space in 1961 carried out by Gagarin.

BEIJING, April 19 (Xinhuanet) -- Almost one year after the disastrous oil spill, scientists believe that the overall health of the Gulf of Mexico as nearly back to normal.However, the scientists restrain their optimism about nature's resiliency with the glaring blemishes out there. It's been nearly a year since BP's Gulf of Mexico oil spill began last April, triggering one of the world's worst environmental disasters. Nearly 5 million barrels of oil leaked from the ruptured Deepwater Horizon well during the months-long catastrophe.BP said last November that the disaster cost it nearly 40 billion U.S. dollars, according to a Guardian report.According to a BP survey of researchers, over three dozen scientists grade the Gulf's big picture health a 68 on average, using a 1-to-100 scale.That's just a few points below the 71 the same researchers gave last summer when asked what grade they would give the ecosystem before the spill. And it's an improvement from the 65 given back in October after months of the oil spill.

SAN FRANCISCO, March 7 (Xinhua) -- The world's leading hard rive producer Western Digital Corp. on Monday announced that it has agreed to buy Hitachi Ltd.'s hard disk drive unit for about 4. 3 billion U.S. dollars, a move that will create a dominant player in the industry.Western Digital said that it plans to acquire Hitachi Global Storage Technologies, a wholly-owned subsidiary of Hitachi Ltd., in cash and stock.The proposed combination will result in a customer-focused storage company with the industry's broadest product lineup backed by a rich technology portfolio, Western Digital said.According to their agreement, the resulting company will retain the Western Digital name and remain headquartered in Irvine in the U.S. state of California.The transaction has been approved by the board of directors of each company and is expected to close during the third quarter of 2011.With the purchase, Western Digital will claim 49.6 percent share of global hard disk drive unit shipments based on latest quarterly statistics, compared to 29.4 percent for Seagate Technology LLC, the industry's No. 2 supplier, research firm iSuppli pointed out.The deal will give Western Digital a lead of 20.2 percentage points over Seagate, up from a mere 2 points without the acquisition, iSuppli said in a research note released Monday.The acquisition will also allow Western Digital to enter the critical enterprise hard disk drive segment, where it currently is only a marginal player.Analysts believed that the purchase might be a consequence of declining hard disk drive shipments, which are being impacted by the rising sales of tablet computers, which don't use hard disk drives and are cutting into the sales of mobile PCs, a major market for hard drives."Amid weaker industry conditions, organic sales growth is more difficult to achieve, prompting hard disk drive suppliers to engage in acquisitions to gain market share," iSuppli noted.

LOS ANGELES, May 8 (Xinhua) -- Kids born in the spring and summer months might be more likely to develop celiac disease, U.S. researchers have found.Researchers from the Massachusetts General Hospital for Children drew the conclusion after examining data on 382 children diagnosed with celiac disease at between 11 months and 19 years of age, HealthDay News reported on Sunday.The study found that in the 15- to 19-year-old set, birth season appeared to make no difference, but among 317 children younger than 15 years of age, 57 percent were born in the "light" season of March through August, compared with 43 percent who were born in the "dark" season of September through February.The findings suggest that the higher incidence of this autoimmune disease may be related to a combination of seasonal and environmental factors, the report said.Celiac disease is a digestive disorder triggered by consuming the protein gluten, which is primarily found in bread and other foods containing wheat, barley or rye. It can damage the small intestine and make it difficult to absorb certain nutrients, causing problems ranging from abdominal pain to nerve damage.Even though the exact cause of celiac disease is unknown, potential triggers include the timing of infants' introduction to gluten, and viral infections contracted during the first year of life.The study's findings suggest the season of a child's birth is another potential risk factor for the disease.The researchers pointed out that infants are generally introduced to solid foods containing gluten at around six months of age, which for spring and summer babies would coincide with cold and flu season.Based on the findings, the age at which gluten is first offered to some babies may need to be altered, said the study's lead researcher, Dr. Pornthep Tanpowpong. "If you're born in the spring or the summer, it might not be appropriate to introduce gluten at the same point as someone born in the fall or winter," said Tanpowpong. "Although we need to further develop and test our hypothesis, we think it provides a helpful clue for ongoing efforts to prevent celiac disease."The study also noted that exposure to sunlight may also play a role in celiac disease, since vitamin D deficiency has been associated with the disease.The study was presented Sunday in Chicago during Digestive Disease Week, an international gathering sponsored by the American Gastroenterological Association and other organizations, HealthDay News said.Because the study was presented at a medical meeting and is small, its findings should be considered preliminary until published in a peer-reviewed journal and confirmed in other research, the report said.

BEIJING, May 21 (Xinhua) -- China's State Food and Drug Administration (SFDA) issued a circular on Friday banning the use of Nimesulide, an anti-inflammatory drug, for children under the age of 12, considering potential side-effects such as liver and kidney damage.Nimesulide is a non-steroidal anti-inflammatory drug that first became available in Italy in 1985. It is now used in more than 50 countries and regions.The drug entered Chinese markets in 1997.According to the SFDA, while common adverse reactions to the drug include vomiting and stomache, domestic and overseas statistics indicate that more severe issues are related to the drug, such as blood coagulation disorders, decreased white blood cells and damage to liver and kidney.Previously, the SFDA only prevented the use of the drug among children one year old or younger.Also on Friday, the SFDA ordered the suspension of the production, sales and use of Duxil (almitrine and raubasine compound) due to its "unobvious" efficacy.According to the SFDA, clinical research found "little" evidence proving the drug effectively improves the cognitive ability for patients suffering vascular cognitive impairment.The drug was supposed to treat symptoms related to cognition and sensory nerve damage.The moves came after a two-month nationwide campaign was launched earlier this month to probe the quality of essential drugs and ensure drug safety.Official figures show that China's National Center for Adverse Drug Reaction Monitoring received 692,904 reports of adverse reactions in 2010, up 8.4 percent compared with those in 2009.Among the total, 109,991 cases involved new or severe adverse reactions, a year-on-year increase of 16.2 percent.