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Which foods should be eaten to keep us healthy?Let us look at some important vitamins for these answers.
Vitamin A helps prevent skin and other tissues from becoming dry.People who do not get enough vitamin A cannot see well in darkness.Vitamin A is found in fish liver oil.It also is in the yellow part of eggs.Sweet potatoes,carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin
A.
Vitamin B-one changes starchy（含淀粉的）foods into energy. It also helps the heart and nervous system work smoothly.Without it,we would be weak and would not grow.Vitamin B-one is found not just in whole grains like brown rice,but also in other foods.These include beans and peas,nuts,and meat and fish.
Vitamin B-twelve is needed so folic acid（叶酸）can do its work. Together, they help produce red blood cells.Vitamin B-twelve is found naturally in foods such as eggs,meat,fish and milk products.Folic acid has been shown to prevent physical problems in babies when taken by their mothers during pregnancy.Vitamin B-twelve is found in green leafy vegetables and other foods,like legumes and citrus fruits.In some countries,it is added to products like bread.
Vitamin C is needed for strong bones and teeth,and for healthy blood passages.It also helps wounds heal quickly.The body stores little vitamin
C.So we must get it every day in foods such as citrus（柑橘类）fruits,tomatoes and uncooked cabbage.
Vitamin D increases levels of the element calcium in the blood.Calcium is needed for nerve and muscle cells to work normally.It also is needed to build strong bones.Ultraviolet light from the sun changes a substance in the skin into vitamin
D.Fish liver oil also contains vitamin
D.
Vitamin K is needed for healthy blood.It thickens the blood around a cut to stop bleeding. Vitamin K can be found in pork products,liver and in vegetables like cabbage,kale and spinach.
Vitamin K is needed for strong bones.
A.Right
B.Wrong
C.Not mentioned
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These Foods Help Improve Your Memory
Though sleeping is the best way to enhance your memory,the foods in your diet also play a role in how your memory works.People care their diets in terms of whether it helps them build muscle or lose fat,but they neglect to think of how food can improve memory.
In addition to eating memory foods,right meal amount plays an important role in how well your memory functions.Too little food will cause you to be distracted by hunger,while too much of it will make you sleepy.Incorporating the right memory foods and proper portion sizes will give you maximum results.
Here are some of the memory foods that you should incorporate into your diet to reap the benefits of memory enhancement.
Salmon
As far as the protein is concerned,one of the best sources is salmon,for it is a good source of
omega-3 fatty acids,which are essential for brain function and development. Studies have suggested that supplementing with DHA,which is found in fish oil,is beneficial for the development and maintenance of memory performance.
Sunflower seeds
Nuts have been regarded as a great way to get healthy fats into your diet,but many people forget that seeds fall into this category too.Sunflower seeds are a rich source of vitamin E,with one ounce providing 30%of your total daily intake.Vitamin E is one of the primary antioxidants that helps decrease the decline of memory as you get old,making it one nutrient you'll want to be sure to consume.
Other sources of vitamin E include wheat germ oil,dry almond,safflower oil,hazelnut,peanut butter, spinach, broccoli, kiwi, and mango.
Blueberries
While all berries provide a number of health-related benefits,blueberries in particular area memory-boosting powerhouse.They are considered a memo汀food because they contain a phytochemical that is especially important in reversing the age-related decline of memory，while having a positive influence on spatial working memory．
Besides,blueberries rank low on the glycemic（血糖）index scale,making them a good fruit choice if you are trying to control your blood sugar level.
Lean beef
Including appropriate amount of lean beef in your diet is beneficial in enhancing your memory because of its iron content.While most men get enough iron in their diet,those who are on a strict diet and are sticking mostly to chicken,egg whites and fish as sources of protein may be running a bit low.
Iron deficiency can have a significant effect on brain function and impair learning abilities, eventually putting you at an increased risk for developing Alzheimer's disease.So,be sure you aren't cutting out good sources of iron from your diet一even if you,re striving for maximum fat loss.
If you're striving for maximum fat loss,you'd better cut out good sources of iron from your diet.
A.Right
B.Wrong
C.Not mentioned
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New Foods and the New World
In the last 500 years,nothing about people—not their clothes,ideas,or languages—has changed as much as what they eat. The original chocolate drink was made from the seeds of the cocoa tree by South American Indians .The Spanish introduced it to the rest of the world during the 1500's .And although it was very expensive,it quickly became fashionable.In London,shops where chocolate drinks were served became important meeting places. Some still exist today.
The potato is also from the New World. Around 1600,the Spanish brought it from Peru to Europe,where it soon was widely grown. Ireland became so dependent on it that thousands of Irish people starved when the crop failed during the“Potato Famine”of 1845—1846,and thou- sands more were forced to emigrate to America.
There are many other foods that have traveled from South America to the Old World. But some others went in the opposite direction. Brazil is now the world's largest grower of coffee,and coffee is an important crop in Colombia and other South American countries.But it is native to Ethiopia. It was first made into a drink by Arabs during the 1400's.
According to an Arabic legend,coffee was discovered when a person named Kaldi noticed that his goats were attracted to the red berries on a coffee bush.He tried one and experienced the “wide-awake”feeling that one-third of the world's population now starts the day with.
The Arabic legend is used to prove that
A.coffee was first discovered by Kaldi
B.coffee was first discovered by Kaldi's goats
C.coffee was first discovered in south American countries
D.coffee drinks were first made by Arabs
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Privacy Worry May Keep HIV Patients From Therapy
Patients infected with HIV are often concerned about the confidentiality of their HIV-positive status.In
fact,some patients are so worried that they will actually give up treatment to prevent the release of this
information,according to a report published in the August issue of AIDS Care.
Dr. Kathryn Whetten-Goldstein and colleagues from Duke University,Durham,North Carolina,studied
the confidentiality issues of 15 HIV-infected patients from rural North Carolina locations.They were divided
into groups designed to explore their attitudes toward,and experiences with,breaches in confidentiality.
"The fear of a breach in confidentiality is' definitely affecting the care that HIV-infected patients
receive,"Whetten-Goldstein said."Most studied patients had experienced or knew someone who had
experienced a breach in confidentiality."
"Two types of breaches occurred,"Whetten-Goldstein noted."The first was a more obvious type of
breach.One example was a nurse who told her child that her patient was HIV-positive out of concern that
her child would play with the patient's child."
"The other type of breach was more subtle,one that providers might not consider breaches,"Whetten-
Goldstein explained."This type of breach involves providers talking about a patient's HIV status without the
patient's knowledge of the interaction."
"The law allows the sharing of information between providers within the same institution,but patient's
consent must be obtained before providers at different institutions can share information,"she pointed out.
"Patients in the study wanted providers to tell them when they are going to share information with other
providers and why it is being done,"Whetten-Goldstein said."They also felt that providers should be
punished when a breach occurs."
"However,because patients are often reluctant to seek legal action which may further expose their
status,they felt that the system should regulate itself,"she added.
Quite a few patients will firmly defend their own right if such a breach occurs.
A.Right
B.Wrong
C.Not mentioned
