Sometimes successful health campaigns can have quite unexpected reactions.The years of warnings about skin cancer mean that Britons are happy to cover themselves in sunscreen or stay out of the sun altogether, but it also means that most of us are not getting enough vitamin D.

Scientists announced yesterday that Britons need to increase to three times the amount of vitamin D they get per day.They called on food producers to fortify(强化)their products with more of the vitamin and suggested people should consider taking supplements(补充物) to keep levels up.They also suggested getting out in the sun for short periods more often, but they warned against “sun bingeing”.

The government does not publish official advice on the amount of vitamin D people should take due to a lack of research, says Dr Birgit Teucher of the Institute for Food Research.But in the US, the government recommends 5 micrograms a day.By that count, Dr Birgit Teucher said that around 90% of Britons between 19 and 64 would be lacking in the vitamin because they only took around 3 micrograms a day.

Vitamin D is important for absorption of calcium(钙)by the body, which is needed for healthy teeth and bones.A lack of it can lead to serious diseases in both children and adults.The vitamin can be found in some foods but it can also be obtained from chemicals in the skin reacting to sunlight.Dr Barbara Boucher said adults should get 5 to 25 micrograms a day.Shortage of vitamin D may be linked to diseases such as muscle weakness, high blood pressure and rickets(佝偻病).

Dr Birgit Teucher gave several reasons for the lack among Britons.Increasing numbers of office-based jobs mean a lack of exposure to the sun; and the rise of becoming overweight means that vitamin D—which is fat soluble(可溶解的)一is increasingly stored in body fat, where it cannot be accessed readily.

Professor Brian Wharton of the Institute of Child Health said that children in particular needed to have enough vitamin D to prevent rickets.

Professor Graham Bentham, an environmental scientist at the University of East Anglia, added that babies who were only breast-fed probably need to take supplements in case their mother was vitamin D lacking.Those drinking milk were likely to be OK, thanks to the fortification of the drink.

The scientists called on food producers to fortify milk, bread and breakfast nutrient to enable people to get their daily amount of the vitamin.Prof Graham Bentham added that 30 minutes of sun exposure to the face and forearms between April and October would be sufficient.Outside these months, the sun is not strong enough in Britain for the body to produce its own vitamin D.

But Prof Graham Bentham warned against spending too long in the sun.“Sun bingeing is well known to be dangerous,” he said.“In any case, vitamin D transformation in the skin switches off after a while so short frequent amounts are better for vitamin D formation.”

1.From Paragraphs l&2 we can infer that_________.

A. some health campaigns are very successful

B. people are lacking in various vitamins

C. Britons are advised not to get out in the sun

D. vitamin D can be obtained by staying in the sun

2.The word “sufficient” (Paragraph 8) is the closest in meaning to _________.

A. enough B. proper

C. familiar D. available

3.From the passage, we can conclude_________.

A. the babies who were only breast—fed certainly need to take vitamin D supplements

B. a large quantity of vitamin D stored in body fat is the primary reason for being overweight

C. the sunlight can produce adequate vitamin D that the body needs all year round

D. vitamin D is vital for the body to absorb calcium needed for healthy teeth and bones

4.The government doesn’t give official advice on the amount of vitamin D because_________.

A. they think it is harmful for health

B. they don’t want to be blamed

C. they aren’t confident of its function

D. they haven’t concrete proof

5.Which best describes the writer’s tone in the passage?

A. Humorous. B. Objective.

C. Pessimistic. D. One-sided.

As children begin to head back to school, there are several things that you can do to make sure that your child stays healthy and performs at their peak potential during the school year.

1.Make sure your child is up to date on their immunizations(免疫).The summer is a good time to schedule visits to the doctor’s as your child is not in school, and the visit won’t require that your child miss school days.

2.Encourage proper nutrition.America faces childhood obesity(肥胖).This means that the percentage of overweight children is increasing each year, and this will place your child at risk of developing a variety of diseases when they are middle age or even young adults.You can start helping your child to become healthier by offering fruits and vegetables at home instead of calorie heavy potato chips and candy.

3.Get your child involved in sports activities.Activities in high school such as track and cross-country are important for socialization for your child, as well as helping to improve their health.You can get your child interested in wholesome activities by discussing with them how you enjoyed similar activities in high school.

4.Have the birds and the bees conversation with your child.Many children become sexually active in junior school and senior high school, and the sooner you discuss sex with your child the sooner they will be prepared.Tell your child that there is always the possibility of infecting a sexual disease when two people have sex; and discuss with your child the use of condoms.The sooner you start having this embarrassing situation the better.

5.Know your child’s friends.You can do this by inviting your child to bring their friends over to your house for a pizza night, or by chatting with them when they stop by your house.If you find your child’s friend has a bad reputation, then you could consider introducing your child to a different network of people, such as through the girl/boy scouts.Forbidding your child from seeing a certain person may only lead them to rebel and become closer to that person.

6.Discuss with your child the seriousness of drug use and abuse.Your child may not realize that using drugs can have serious consequences.Your child may get the false impression that drug use is his right.Explain to a child that saying no to drugs is their right, and that anybody offering them drugs is not their friend.

7.Help your child to avoid a life long smoking addiction by discussing with them the consequences of smoking.The sad fact is that most smokers became addicted when they were in their teenage years, and are unable to quit for long periods of time and often die many years earlier due to their smoking habit which increases the risk of lung cancer, heart disease, and a variety of medical conditions.Even if you are a smoker yourself, you can discuss with your child about how damaging smoking can be on a person’s health.

8.Impress upon your child the importance of traffic rules.Tell them that it is OK to wear a seat belt in anyone’s car, because it may save their life one day.If your child rides a bicycle or a skateboard, then discuss with them the importance of always wearing a helmet.As you child becomes qualified for driver’s permit, you should discuss with them the importance of prevention from drinking and driving.

9.Be cautious about signs of depression in childhood.A surprisingly large number of children may become depressed, and a small number of teenagers and children commit suicide(自杀) each year.Realize that any signs of unusual depressed mood, angry outbursts, suicidal comments, feelings of hopelessness, and loss of enjoyment of activities with friends may be signs of depression.

1.What topic is NOT discussed in this passage?

A. Traffic B. Smoking

C. Depression D. Study

2.The first three tips focus on children’s .

A. medical care B. nutritious food

C. physical health D. sports activities

3.“Have the birds and the bees conversation with your child” means “ ” .

A. have a humorous talk to children about sex

B. tell children stories about the animal world

C. give a formal expert education to children

D. deliver lectures to children on sex diseases

4.This passage is meant for parents to .

A. teach their children to behave well

B. prepare their children for a new term

C. educate their children after school

D. train their children for special ability

 0  133056  133064  133070  133074  133080  133082  133086  133092  133094  133100  133106  133110  133112  133116  133122  133124  133130  133134  133136  133140  133142  133146  133148  133150  133151  133152  133154  133155  133156  133158  133160  133164  133166  133170  133172  133176  133182  133184  133190  133194  133196  133200  133206  133212  133214  133220  133224  133226  133232  133236  133242  133250  151629 

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网