中山女人大便出血是怎么回事(中山什么是痔疮啊) (今日更新中)

WASHINGTON, Dec. 22 (Xinhua) -- The journal Science on Thursday chose the HPTN 052 clinical trial, an international HIV prevention trial as the 2011 Breakthrough of the Year.The study found that if HIV-infected heterosexual individuals begin taking anti-retroviral medicines when their immune systems are relatively healthy as opposed to delaying therapy until the disease has advanced, they are 96 percent less likely to transmit the virus to their uninfected partners. Findings from the trial, first announced in May, were published in the New England Journal of Medicine in August.The study was funded by the U.S. National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health."The HPTN 052 study convincingly demonstrated that anti- retroviral medications can not only treat but also prevent the transmission of HIV infection among heterosexual individuals," said NIAID Director Anthony Fauci in a statement. "We are pleased that Science recognized the extraordinary public health significance of these study results."Science's list of nine other ground-breaking scientific achievements from 2011 include:The Hayabusa Mission: After some near-disastrous technical difficulties and a stunningly successful recovery, Japan's Hayabusa spacecraft returned to Earth with dust from the surface of a large, S-type asteroid. This asteroid dust represented the first direct sampling of a planetary body in 35 years, and analysis of the grains confirmed that the most common meteorites found on Earth, known as ordinary chondrules, are born from these much larger, S-type asteroids.Unraveling Human Origins: Studying the genetic code of both ancient and modern human beings, researchers discovered that many humans still carry DNA variants inherited from archaic humans, such as the mysterious Denisovans in Asia and still-unidentified ancestors in Africa. One study this year revealed how archaic humans likely shaped our modern immune systems, and an analysis of Australopithecus sediba fossils in South Africa showed that the ancient hominin possessed both primitive and Homo-like traits.Capturing a Photosynthetic Protein: In vivid detail, researchers in Japan have mapped the structure of the Photosystem II, or PSII, protein that plants use to split water into hydrogen and oxygen atoms. The crystal-clear image shows off the protein's catalytic core and reveals the specific orientation of atoms within. Now, scientists have access to this catalytic structure that is essential for life on Earth -- one that may also hold the key to a powerful source of clean energy.Pristine Gas in Space: Astronomers using the Keck telescope in Hawaii to probe the faraway universe wound up discovering two clouds of hydrogen gas that seem to have maintained their original chemistry for two billion years after the big bang. Other researchers identified a star that is almost completely devoid of metals, just as the universe's earliest stars must have been, but that formed much later. The discoveries show that pockets of matter persisted unscathed amid eons of cosmic violence.

BEIJING Jan. 10 (Xinhuanet) -- Scientists have found a plant in Brazil using leaves to capture the tiny worms in the soil, according to Monday's Proceedings of the National Academy of Sciences in the U.S.The plant, named Philcoxia, was found in the tropical grassland of Brazil, where the biodiversity is well conserved.As the scientists searching for the answer of why the plant grows the leaves underground, they found the 1.5 millimeters-wide leaves can trap the worms and produce a digestive enzyme to help its roots to absorb the nutrition.Although it is not the first meat-eating plant to be discovered, the finding has still "broaden up our perception about plants," according to researcher Rafael Silva Oliveira, a plant ecologist at the State University of Campinas in Brazil.It suggests that carnivorous plants "may have evolved independently more times in plants than previously thought," he added

BEIJING, Oct. 26 (Xinhua) -- The State Council, or China's cabinet, has decided to create a food allowance for about 26 million needy students nationwide, according to a statement issued on Wednesday.Each student will receive an average of three yuan (47 cents) daily from the central budget, said a statement issued after a State Council meeting presided over by Premier Wen Jiabao.The policy will be implemented on a trial basis in 680 less-developed counties, the statement said.Authorities will have to allocate a total of 16 billion yuan annually from the central budget to meet the policy's requirements, it said.The money will be given to schools instead of directly to the students' families, allowing the schools to provide more and better food in their canteens, the statement said.Efforts will be made to build better canteens in rural primary and middle schools, the statement said.The statement added that daily allowances for needy students at primary boarding schools will also be increased from three to four yuan, while those for students at middle boarding schools will rise from four to five yuan.

BEIJING, Dec. 14 (Xinhua) -- Chinese President Hu Jintao on Wednesday exchanged congratulatory messages with Cypriot President Demetris Christofias on the 40th anniversary of bilateral diplomatic ties.In his message, Hu said bilateral ties between China and Cyprus have developed smoothly since they were established.Political mutual trust has continued to deepen and the two countries understand each other and support each other's major concerns, he said, adding bilateral pragmatic cooperation has also been expanding continuously.China highly values its relations with Cyprus and is ready to work with the country to deepen their traditional friendship, strengthen exchanges at various levels and enhance cooperation in such areas as economy, trade, culture and tourism, the Chinese president said.Hu said China is also willing to maintain communication and coordination with Cyprus on international and regional affairs.Christofias, for his part, said China and Cyprus have carried out close exchanges and cooperation, adding bilateral ties have been further strengthened through frequent high-level exchanges in recent years.Cyprus believes the two countries are on friendly terms and understand each other, which is in line with the common interests of both China and Cyprus, Christofias said.The president said Cyprus also believes bilateral relations would make further progress in the future.Chinese Foreign Minister Yang Jiechi also exchanged congratulatory messages on Wednesday with his Cypriot counterpart Erato Kozakou Marcoullis.

PHNOM PENH, Oct. 3 (Xinhua) -- Cambodia reported on Monday that some 54 Cambodian children had been killed by dengue fever in the first nine months of this year, compared to 37 kids dying of the disease in the whole year of 2010.From January to September this year, some 12,392 cases of dengue fever had been reported with 54 children killed by the disease. The whole year 2010 reported only 5,497 cases, Ngan Chantha, director of dengue control at the Ministry of Health, said on Monday."This year's rainy season has been plagued by floods, leading to more cases of the disease," he said. "I would like to appeal to parents to let their children sleep under mosquito nets and if their kids have any symptom that is suspicious of the disease, they should urgently send them for medical attention."Dengue is caused by mosquitoes. The disease causes an acute illness of sudden onset that usually follows symptoms such as headache, fever, exhaustion, severe muscle and joint pain, swollen glands and rash.In Cambodia, the outbreak of dengue fever usually begins at the onset of the rainy season from May to October. 

来源：资阳报