济南频繁异常勃起有什么危害(济南前列腺炎的检查) (今日更新中)

BEIJING, Nov. 30 (Xinhuanet) -- Heading football frequently may cause brain damage leading to subtle but serious declines in thinking and coordination skills, a new study suggested as quoted by media reports Wednesday.Researchers used an advanced MRI (Magnetic Resonance Imaging) technique to analyze changes in brain white matter of 32 adult amateur soccer players who head balls 436 times a year on average.The study found players who head football quite frequently -- with 1,000 or more a year -- showed abnormalities similar to traumatic brain injuries suffered in car accidents."This is the first study to look at the effects of heading on the brain using sophisticated diffusion tensor imaging," said Dr. Michael Lipton, a leading researcher and associate director of the Gruss Magnetic Resonance Research Center at the Albert Einstein College of Medicine in New York City."We found the real implication for players isn't from hitting headers once in a while, but repetitively, which can lead to degeneration of brain cells," he added.The researchers compared neurological images of study participants, whose average age was 31, and found those with the highest volume of headers had abnormalities in five areas of the brain, responsible for attention, memory, physical mobility and high-level visual functions.The findings come in the wake of mixed reports on the so-called "cognitive" consequences of frequently heading soccer balls at practice.Dr. Chris Koutures, a pediatrician and sports medicine specialist in Anaheim Hills, California, said the retrospective imaging study was fascinating, but needs more data to effectively determine safe header limits, especially for younger players.Dr. Lipton agreed neuropsychological damage from headers would be hard for a coach or physician to notice since cognitive problems develop gradually, and even players might not be aware of mild memory loss."We can't tell an individual today not to be heading a ball, but caution is a good thing," Lipton said. "We need more research for definitive answers and we have the advanced imaging tools to do it."

DOHA, Jan. 19 (Xinhua) -- Visiting Chinese Premier Wen Jiabao met here Wednesday with Qatari Emir Sheikh Hamad bin Khalifa al-Thani over bilateral ties.During the meeting, Wen said China-Qatar relations have seen rapid development although diplomatic ties between the two countries are young.Both countries have adhered to the principles of respecting each other and treating each other as equals, the premier noted.The Chinese and Qatari economies are highly complementary, and China is ready to work with Qatar to push bilateral political relations and pragmatic cooperation to higher levels from a strategic perspective, said Wen.Chinese Premier Wen Jiabao (L) meets with Sheikh Hamad bin Khalifa al Thani (R), the emir of Qatar, in Doha, capital of Qatar, Jan. 18, 2012.He said he has deeply felt the Arab people's friendship toward the Chinese people during his ongoing Gulf tour, which had taken him to Saudi Arabia and the United Arab Emirates before he arrived in Doha earlier Wednesday.The development of the China-Arab relations has a solid political foundation and enjoys extensive public support, Wen said, adding that both sides hope to intensify pragmatic cooperation so as to promote their socioeconomic development and bring tangible benefits to their peoples.The Chinese premier said he is confident in the future of the China-Arab relations.Noting that profound and complicated changes are taking place across West Asia and North Africa, Wen said China believes that countries in the region can solve their own problems by themselves.China supports the efforts made by Qatar and other Gulf nations in maintaining regional stability, he said, adding that the international community should play a constructive role in this regard and that China is ready to enhance communication and coordination with Qatar.The emir, for his part, said Wen's visit has yielded fruitful results and greatly improved bilateral relations.He said Qatar is committed to pushing forward friendly cooperation with China in various areas, carrying out Qatar-China cooperation projects and stepping up coordination and collaboration with China on regional and world affairs so as to lift the bilateral relations to higher levels.

KUNMING, Dec. 11 (Xinhua) -- By moonlight, Ma Yuanqiong, a grassroots AIDS prevention practitioner, and her colleagues slipped into a large community of migrant workers in the city of Jinghong in southwest Yunnan province.As usual, they were greeted tepidly. A dozen sex workers living in the community came to obtain free condoms and brochures on AIDS prevention and quickly dispersed."We visit these women every week. They are familiar with us, but rarely talk about themselves," said Ma, who is in charge of an AIDS prevention program targeting sex workers in Jinghong. The program was initiated by Fuhua International, a local NGO.Sex workers are highly sensitive and vigilant due to safety concerns, since sexual services are illegal in China, Ma said. They have become harder to find since local police started a persistent crackdown on prostitution two years ago and drove many sex workers underground, she said.INACCESSIBILITY IMPEDES EFFORTSJinghong is located in Xishuangbannan Dai autonomous prefecture. Bordering Laos and Myanmar, it's a famous tourist city where the underground sex industry thrives.The AIDS prevention program, which began in 2006, is aimed at improving sex workers' awareness of the epidemic -- which is primarily sexually transmitted -- and prompting them to change risky behavior.In the beginning, program workers quickly realized they faced a significant challenge. "We were often rejected, or even threatened when trying to get in touch with the sex workers at first," Ma said.But the practitioners persisted, approaching nonjudgmentally and treating them as friends, and eventually their efforts began to pay off.During the past five years, the program has provided free condoms and AIDS consulting services to more than 400 sex workers aged 14 to 58 and from many parts of the country, according to Ma.The program has even helped several sex workers give up the business and pursue legitimate careers.However, the organization currently only keeps in touch with about 100 sex workers and has found it more difficult to reach more.The police crackdown has made the sex workers, especially low-paid street hookers, more mobile and less visible, and Ma pointed out that low-paid sex workers are in greater need for outreach as they are more vulnerable to HIV infection than their their higher-paid counterparts."Low-level sex workers are at a heightened risk, as they and their clients, mainly migrant workers and the elderly, all have insufficient knowledge of the disease," she said.According to statistics provided by the provincial disease control and prevention center (CDC) of Yunnan, about 1.6 percent of sex workers in Yunnan have contracted HIV, while the ratio among the low-level group is 3 percent.By the end of October, Yunnan reported 93,567 HIV carriers and AIDS patients, the most among all provinces, autonomous regions and municipalities."We conducted a survey in Jinghong and neighboring Menghai County at the end of 2008 and found that low-level sex workers almost never used condoms then," said Kang Jun, head of the HIV/AIDS prevention and treatment office in Xishuangbanna.The survey also found that the low-level sex workers only charged about 20 yuan (3.2 U.S. dollars) for each service, and every day they received 16 clients on average, according to Kang.Ahead of the police crackdown, Kang and his colleagues had provided HIV testing services for more than 30 low-level sex workers, and the results showed that two of them had been infected by the virus."The testing work was forced to halt as the crackdown began soon and we could hardly find them," Kang said.The good news, he said, was that the local CDC will launch a four-year investigation on sex workers in Xishuangbanna next January as part of a massive state-funded research project.

SHANGHAI, Jan. 11 (Xinhua) -- The listed arm of China's biggest train maker, China South Locomotive and Rolling Stock Industry (Group) Corporation (CSR), has been allowed by regulatory authorities to raise 9 billion yuan (1.41 billion U.S. dollars) on the stock market, the company said Wednesday.The Hong Kong- and Shanghai- listed CSR Corp. Ltd. will sell 1.96 billion shares at 4.46 yuan apiece to select investors, it said. But CSR's parent -- state-owned CSR Group -- has agreed to buy no less than 6 billion yuan's worth of the shares, leaving the rest to institutional investors.CSR's net profit growth in the third quarter of 2011 plunged to 9.66 percent year-on-year from a high of 85.08 percent in the first half of 2011 as the country put the brakes on development of the railway sector after a deadly bullet train crash on July 23 that killed 40 people and injured 210 others.The decision to slow the development of high-speed rail lines has led to halts in construction of about 90 percent of ongoing railway projects, or 10,000 km of rail lines across the country, local media reported earlier.CSR is the maker of the bullet trains involved in last July's deadly collision. After the accident, the company's executives bought a combined 540,000 share in August, a move seen as an attempt to bolster battered stock prices.Analysts say the fundraising would help CSR greatly ease its financial burdens. The company earlier pledged to maintain profit growth and its dividend policy to boost investors' confidence.

PARIS, Oct. 1 (Xinhua) -- People come to the French capital will be able to enjoy a new public service by leasing electric cars in the urban region from Sunday.This car-sharing system is aimed to reduce the number of private cars as well as restrain pollution, according to the Paris municipal government.The plan, dubbed "the Autolib" system, is similar to already functioning "velib system" which is a large-scale public bicycle sharing system in Paris launched in 2007.The first experimental stage of the Autolib project is said to last two month with 66 cars at 33 stations around the city.Costumers can pay between 5 euros and 7 euros (6.7-9.4 U.S. dollars) for every half-hour use or register for a yearly, weekly or 24-hour package with different cost and necessary identity cards, driving licences and an uncashed deposit.Once fully charged, the four-seated "Bluecar" can reach a top speed of 130 km an hour and has a range of 250 km with a single charge.In order to encourage short journey rather than long trip around the capital, Paris administration wants to expand the system to a 250-car team by this December, and then to 2,000 by next summer.

来源：资阳报