梅州怀孕后什么时候做人流(梅州妇科病宫颈炎症状) (今日更新中)

WASHINGTON, Jan. 2 (Xinhua) -- A systematic review of previous studies suggests that there may be a positive connection between physical activity and children's academic performance, according to a report published Monday in the Archives of Pediatrics & Adolescent Medicine.A group of scientists at the Vrije Universiteit (Free University) Medical Center in the Netherlands reviewed evidence on the relationship between physical activity and academic performance because of concerns that pressure to improve test scores may often mean more instructional time for classroom subjects with less time for physical activity.The authors identified 10 observational and four interventional studies for review, 12 of which were done in the United States, one in Canada and one in South Africa. Sample sizes ranged from 53 to about 12,000 participants between the ages of eight years and 18 years old. Follow-up varied from eight weeks to more than five years."According to the best-evidence synthesis, we found strong evidence of a significant positive relationship between physical activity and academic performance. The findings of one high-quality intervention study and one high-quality observational study suggest that being more physically active is positively related to improved academic performance in children," the report said.Background information in the article suggests that exercise may help cognition by increasing blood and oxygen flow to the brain, increasing levels of norepinephrine and endorphin to decrease stress and improve mood, and increasing growth factors that help create new nerve cells and support synaptic plasticity."More high-quality studies are needed on the dose-response relationship between physical activity and academic performance and on the explanatory mechanisms, using reliable and valid measurement instruments to assess this relationship accurately," the report concluded.

MOSCOW, Oct. 3 (Xinhua) -- A Soyuz-2.1B rocket carried a Glonass-M navigation satellite into orbit early Monday after a two-day delay caused by high winds, a Russian Space Forces spokesman said."The launch of the booster rocket is as scheduled. The satellite Glonass-M was put into the orbit under control at 03:55 Moscow time (2355 GMT on Sunday)," said Colonel Alexei Zolotukhin.Zolotukhin told reporters that the rocket was launched at 0:15 Moscow time (2015 GMT, Sunday) from the Plesetsk Space Center in northern Russia.The Russian Space Forces said the launch was initially scheduled for Saturday but was postponed due to high winds.Glonass is the Russian equivalent of the U.S. Global Positioning System (GPS), which is designed for both military and civilian use. The system requires 24 operational and 2-3 reserve satellites in orbit to ensure global coverage.In December 2010, a malfunction of the booster resulted in a loss of three Glonass satellites.

BEIJING, Dec. 26 (Xinhua) -- China has launched a one-year inter-agency national campaign aiming to return most street children home, the Ministry of Civil Affairs (MCA) said Monday.The MCA will lead the campaign, which is joined by the ministries of education, public security, financial, health, human resources and social security, and housing and urban-rural development, an MCA statement said."We will try our best to identify most street children in cities and send them home by the end of 2012," the statement said.Minister Li Liguo of Civil Affairs said, ministries concerned should strengthen communication and coordination, and speed up the revision of regulations on the relief of city beggars and vagrants.The MCA also urged provincial governments to set up special offices coordinating the campaign. Several provinces, such as Hebei and Yunnan, have been working on this, the statement said.Police will step up their efforts to identify and rescue street children who wander near railway stations, major tourist sites, business areas and subway stops, while civil affairs departments will assist investigation and provide shelter for homeless children, the statement said.Urban communities and neighborhoods are asked by the ministry to report homeless children to local police. Police and civil affairs departments will cooperate to ascertain the whereabouts of their parents or guardians.In home places of street children, education departments are urged to send them to schools or vocational schools, and those from needy families will have their tuition reduced or waived.Health departments are required to offer street children easy access to medical facilities in emergency cases. Hospitals listed in the campaign will treat sick street children free of charge.

BEIJING, Oct. 12 (Xinhuanet) -- Study found that women who took multivitamins may actually be at risk, media reports on Wednsday.Women who took the dietary supplements vitamin B6, folic acid, magnesium, zinc, copper, iron and multivitamins had a higher risk of death than women who did not.The new study, published in the Archives of Internal Medicine, examined more than 38,000 women aged 55 and older who took part in the Iowa Women's Health Study, which started in the mid 1980s. Researchers found the vitamins did nothing to reduce the risk of death and that most supplements have no positive effect on women's health.The study did not distinguish if the women in the study took the vitamins to fight diseases or to maintain health.Vitamin experts say the best way to make sure you are getting all necessary vitamins is to eat a well-balanced diet. The vitamins people take do not  depend on personal preference.

BEIJING, Dec. 14 (Xinhua) -- China's new yuan-denominated lending in November rose 7.8 billion yuan (1.2 billion U.S. dollars) year-on-year to 562.2 billion yuan, the People's Bank of China, the central bank (PBOC), announced Wednesday.New loans in the month were smaller compared to that in October, which stood at 586.8 billion yuan.By the end of November, the outstanding broad money supply (M2), which covers cash in circulation and all deposits, rose 12.7 percent year-on-year to 82.55 trillion yuan, according to data released by the PBOC.Meanwhile, the narrow measure of money supply (M1), which covers cash in circulation plus demand deposits, increased 7.8 percent year-on-year to 28.14 trillion yuan by the end of last month, the figures showed.New yuan deposits last month fell sharply to 324.7 billion yuan, down 262.6 billion yuan year-on-year. Outstanding yuan-denominated deposits totaled 79.51 trillion yuan as of the end of last month, up 13.1 percent year-on-year, however, the growth rate was 6.5 percentage points lower compared to the same period last year.Meanwhile, outstanding foreign currencies-denominated deposits stood at 266.8 billion U.S. dollars, up 12.9 percent year-on-year. New deposits of foreign currencies rose 4.1 billion U.S. dollars year-on-year.

来源：资阳报