In one sentence, describe what the following article is about: One of the best ways to avoid getting sick is to keep your immune system healthy. Try to eat plenty of fish, vegetables, and fruit, and avoid crash diets and rapid weight loss as this can make you more prone to illness. Some of your favorite dishes have significant health benefits during cold and flu season.  Onions and garlic have been shown to have antiviral effects.  Tuna is packed with glutamine, which improves the efficiency of your immune system.  Yogurt contains probiotics, which help lessen the severity of cold symptoms, and shorten the time you will suffer through the sniffles. The best way to get the proper daily allowances of vitamins is to eat a wide variety of different, healthy foods. Because this isn't always possible, it is a good idea to take vitamin supplements, especially during the colder months.  Vitamin C won't prevent you from getting a cold, but studies have shown it may slightly help shorten the duration and severity of a cold.  It is believed that zinc supports the immune system, possibly stopping the growth of microorganisms in the body, including certain bacteria and cold-causing viruses; however, studies have been mixed in its effectiveness in preventing a cold.  Plus there are potential adverse effects from taking zinc.  Check with your doctor before taking.  Some studies show that while echinacea won't prevent a cold, it can reduce the length and severity of cold symptoms. Moderate exercise boosts the immune system by increasing your overall level of fitness. Walking, in particular, has been linked to an increase in white blood cells, which fight infection. But try to limit exercise if you're already feeling sick, especially if you have a fever – it might actually slow down your recovery.  Adolescents should get at least 60 minutes of moderate physical activity per day; adults should get 75 minutes per week of intense activity, or 150 minutes per week of moderate activity.  In one study, participants who walked for half an hour each day for one year got half the number of colds as the control group who didn't exercise. Try to avoid processed foods, which often contain high amounts of unhealthy sweeteners. Doctors recommend ingesting no more than 6 teaspoons per day for girls, or 9 teaspoons for guys. A typical can of soda contains about 10 teaspoons of sugar – well above the recommended daily limit.  Excessive sugar intake interferes with your white blood cells' ability to combat bacteria and viruses.  Studies have shown that simple carbohydrates like sugar can interfere with the body's immune system for many hours after ingesting it. Your body needs sufficient rest in order to keep up its defenses. Doctors recommend seven to eight hours of sleep for adults, but teens require more sleep. You may need as many as nine and a half hours per day to remain healthy.  One study showed that people who skimped on sleep were almost three times as likely to get a cold as those who slept eight hours per night.  Sleep deprivation can also cause chronic stress, which will increase the severity of symptoms if you do get sick. A flu shot greatly reduces the chances that you will get seasonal flu and pass it on to others. Experts now say that everyone older than 6 months of age should be vaccinated on an annual basis.  Seasonal flu shots are formulated to combat the specific influenza viruses that research indicates will be the most common that year. Despite the rumors, you can't get sick from getting a flu shot – flu vaccines are made either with inactivated, non-infectious viruses, or no viruses at all.
Summary: Eat healthy foods as often as possible. Remember to take your vitamins and minerals. Exercise regularly, but don't overdo it. Cut back on your sugar intake. Get plenty of rest. Get vaccinated.

Use warm (but not hot) water. This solution will help loosen the paint from the brush, making it slip right off.
++++++++++
One-sentence summary -- Mix a gallon (3.8 L) of water with 1/2 cup (120 mL) fabric softener.

Problem: Article: Open the file that you would like to change/improve. At the top of the document, click on the Tools button. A sidebar will appear. Click on Content Editing to expand that field, then click in Edit Text & Images. The editable text blocks will be outlined. Select the text you wish to edit in the standard fashion: click to insert the cursor, click and drag to select multiple characters, double-click to select an entire word, or triple-click to select the entire text block. In Acrobat XI, the text now flows and wraps as one would expect. If you add or remove a significant amount of text, you will want to adjust the text blocks to fit the document. It will have a blue outline, with blue handles on the corners and centers. To adjust the size of a text block, click on a blue handle, and drag as necessary. To adjust the position of a text block, place your cursor over a horizontal or vertical line. The cursor will change to a cross, and you can drag the text block in any direction. Note the green guide lines—those help you keep your text aligned with other text objects on the page you're editing. Holding Shift will snap to horizontal or vertical dragging. Acrobat XI also makes it easy to edit font attributes. Select the word, phrase, or text block you want to edit, then adjust as desired from the Format panel.
Summary:
Launch Adobe Acrobat. Expand the Tools sidebar. Edit the text. Adjust the text blocks. Click in a text block to select it. Edit the font. Don't forget to save your work!