山西产后大便出血怎么办太原市痔疮科的医院,山西大便出血是什么原因,太原市肛肠科医院排名,太原胃镜哪家医院最好,太原肛门无痛流血,山西涨痔疮了怎么办,太原屁股痒怎么治

WASHINGTON, Aug. 11 (Xinhua) -- The unique fossils of an adult plesiosaur and its unborn baby may provide the first evidence that these ancient animals gave live birth like mammals, according to a new study to be published Friday in the journal Science.The 78-million-year-old, 15.4-foot-long (4.7-meter-long) adult specimen is a Polycotylus latippinus, one of the giant, carnivorous, four-flippered reptiles that lived during the Mesozoic Era.Dr. Robin O'Keefe of Marshall University in West Virginia and Dr. Luis Chiappe, Dinosaur Institute director of the Natural History Museum in Los Angeles County, have determined that it is the fossil of an embryonic marine reptile contained within the fossil of its mother.The embryonic skeleton contained within shows much of the developing body, including ribs, 20 vertebrae, shoulders, hips, and paddle bones.O'Keefe and Chiappe have also determined that plesiosaurs were unique among aquatic reptiles in giving birth to a single, large offspring, and that they may have lived in social groups and engaged in parental care.Although live birth has been documented in several other groups of Mesozoic aquatic reptiles, no previous evidence of it has been found in the important order of plesiosaurs."Scientists have long known that the bodies of plesiosaurs were not well suited to climbing onto land and laying eggs in a nest," O'Keefe said."So the lack of evidence of live birth in plesiosaurs has been puzzling. This fossil documents live birth in plesiosaurs for the first time, and so finally resolves this mystery."

BEIJING, Sept. 2 (Xinhuanet) -- The amount of space junk orbiting the Earth could cause fatal leaks in spaceships or destroy valuable satellites, according to a report released by the U.S. National Research Council.Computer models have shown that the number of orbital debris "has reached a tipping point, with enough currently in orbit to continually collide and create even more debris, raising the risk of spacecraft failures," the Research Council said Thursday.So far, there are 22,000 pieces of debris large enough to track from the ground, but smaller objects could still cause serious damage.New international regulations are needed to limit space junk.And more researches should be done to test the possible use of launching magnetic nets or giant umbrellas to push the debris further towards the Earth where it would burn up, or into a higher but safer orbit.

SEOUL, Aug. 31 (Xinhua) -- South Korea's infant mortality rate decreased by nearly half in the last 20 years to stand as the world's 16th lowest, a report showed Wednesday.South Korea had an infant mortality rate of 2.2 per 1,000 in 2009, compared with four deaths per 1,000 newborns reported in 1990, the World Health Organization (WHO) and Save the Children, an international non-governmental organization working for children's rights, said in a joint report.With a 45 percent decline in the infant mortality rate, South Korea ranked 16th lowest among WHO member countries, down from its 88th spot in 1990, according to the report. South Korea's infant mortality rate was the same as France, Estonia and Malta. Meanwhile, the Democratic People's Republic of Korea (DPRK) also showed a decline in the infant mortality rate from 23 per 1,000 in 1990 to 18.1 per 1,000 in 2009, but still remained in the lower ranks with 125th place.

BEIJING, Sept. 26 (Xinhuanet) -- Weather forecasts showed that Thursday or Friday might be suitable for launching the Tiangong-1 spacecraft, experts said.The unmanned spacecraft, part of China's first spacecraft rendezvous and docking mission, was set to blast off from the Jiuquan Satellite Launch Center in Northwest China at an appropriate time between Tuesday and Friday.But the latest weather forecast showed that Tuesday and Wednesday would not be suitable for a launch, Cui Jijun, chief commander of the mission's launch site system, was quoted by China National Radio as saying on Sunday.A precondition for launching is that the average wind speed at the launch site should not be faster than 10 meters a second. The upper-level wind, at 300 meters to 25,000 meters above the Earth, should be no faster than 70 meters a second.The 8.5-ton Tiangong-1 spacecraft and the Long March II-F rocket stand at the Jiuquan Satellite Launch Center on Sept 20. The spacecraft is set to blast off at an appropriate time between Tuesday and Friday.If the wind is too strong, the rising rocket carrier could wiggle and pose a danger, experts said."Everything is ready now except for the right weather," Cui said.On Sunday afternoon, all systems of the Tiangong-1 project went through a joint maneuver, he said. Before that, the 8.5-ton spacecraft, and the Long March II-F rocket that will carry it skyward, were positioned onto the launch pad last Tuesday.Engineers carried out checkups on the conditions of the rocket and the spacecraft, among many other tests in the past few days. All preparation work is done except for fuel loading, he said.Wang Xiaoqing, a publicity official at the launch site, said that the fuel loading usually begins one day before the launch. Once the fuel is loaded into the carrier vehicle, the launch becomes "irreversible".Tiangong-1, or Heavenly Palace 1, will serve as "a target spacecraft" for three rendezvous and docking experiments.The spacecraft rendezvous and docking missions are expected to pave the way for the building of a planned space station scheduled for 2020, previous reports said.Following Tiangong-1, an unmanned Shenzhou VIII spaceship will blast off from the Jiuquan Satellite Launch Center later this year.Lu Jinrong, chief engineer of the mission's launch site system, said that it is rare that two launches of China's manned space program are scheduled in half a year."In the past, the launch site carried out one launch a year, or even one every two to three years," he said."We are already in a high-frequency launch period."

BEIJING, July 25 (Xinhuanet) -- Apple is planning a third, even larger Shanghai store, as well as dozens of other stores throughout China, to cope with huge crowds at its flagship store and a branch, according to media reports Monday.Apple says its Chinese outlets -- two in Beijing and two in Shanghai -- are the four most heavily trafficked Apple stores in the world. They also generate the most revenue. Apple’s push into China shows the depth of the country’s fast-growing economy, and shows that with products not so easy to counterfeit, Chinese consumers are willing to pay a premium.For the first three quarters of Apple’s fiscal year, revenue in China and its Taiwan, Hong Kong was 8.8 billion dollars -- six times that of a year earlier. China has become the second-largest market, after the United States, for apps that run on the smartphone and tablet, according to Distimo, a Dutch company that tracks the popularity of apps.In addition, Apple has been eager to team up with state-run telecom companies, which looks after mobile phone subscriptions.