问题 问答题 简答题

粪便直接显微镜检查可见到哪些食物残渣?

答案

参考答案:

正常或病理情况下,可出现一些食物残渣,应注意与细胞或虫卵区别。

(1)淀粉颗粒:大小不等,形成圆形或椭圆形颗粒,无色、光泽、呈特殊的轮状结构。滴加碘液呈蓝色或红色(红糊精)。腹泻或消化不良时可出现。

(2)脂肪:用苏丹Ⅲ染色可分为中性脂肪、游离脂肪酸和脂肪酸与钙、镁等结合的结合脂肪酸,后者呈不规则块状或片状,不被染色。中性脂肪酸为圆形小滴,大小不一,折光性强,

可染成红色。游离脂肪酸呈片状结晶者可染成橘红色,而呈针状结晶者不着色。脂肪增加多见于腹泻病人。(3)肌肉纤维:淡黄色柱状,带横纹,大量出现可见于大量肉食、腹泻或蛋白质消化不良,最常见于胰腺分泌功能减退。

(4)植物细胞和植物纤维:形态多样化,呈螺旋小管或蜂窝状,或呈圆形、长圆形,有双层细胞壁。食物如经充分消化则粪便中少见,如增多应考虑腹泻及各种原因引起的肠蠕动亢进。

(5)结晶:可见到少量盐类结晶,一般无临床意义。如出现夏科-雷登结晶则提示阿米巴痢疾,血红素结晶则是消化道出血的依据。

单项选择题
完形填空

(共5小题;每小题2分,满分10分)

根据短文内容,从下框的A---F选项中选出能概括每一段主题的最佳选项。选项中有一项为多余选项。

A. Focus on your relationaships.

B. Think about what to do next step.

C. Take good care of your body.

D. Try to avoid overthinking.

E. Set up a proper goal for yourself.

F. Practice acts of kindness.

Five Happiness Secrets For Tough Times

Sonja Lyubomirsky, an author, has researched the science of happiness for years.

Here are her tips to help you cope with a bad economy, and increase your bursts

of happiness throughout the day.

61. ________

“You could spend a lot of time thinking deeply,” says Lyubomirsky. “But that

just makes you feel even more pessimistic, more out of control, and effects your self

esteem. Your relationships will suffer and your job performance will suffer.”

Get rid of pessimism. One of the most effective ways to cope when things are

difficult is to adopt a positive thinking strategy. “What can I learn from this? Times

are tough, I’ve been furloughed at work, but I can spend more time with the kids,

adopt a new hobby, or learn a new set of skills.”

62. ________

Now more than ever we need each other to survive. Lyubomirsky found that doing

good things for friends, family, or strangers can make you happier. Think of practical,

everyday gestures that can make someone’s life a little bit easier. For example,

Lyubomirsky says, “Maybe now many of us can’t afford to take a cab to the airport, so

offer to give a friend a ride.”

63. ________

You don’t need an expert to tell you that relationships are critical to happiness.

Not being the bread-winner anymore or not being able to fulfill your kid’s needs can

weighh down hard on your family life. But the trick is to stop feeling guilty and focus

on caring for your loved ones.

“I was at a psychology conference where an expert was talking about the effects

of this economy on families and how parents can’t afford to buy their kids luxuries

like toys anymore,” says Lyubomirsky. “But what they don’t realize is that kids don’t

care about toys — what they care about is parents being grumpy and taking it out on

them.”

64. ________

“If you find a happy person you will find a project,” says Lyubomirsky. “Happy

people all have goals they care about.”

Commit yourself to a project – whether it is a business you want to start or a dance

you want to learn. But it’s also important to remember to be flexible in these times.

Don’t get frustrated if circumstances are stopping you from meeting your goals. Adopt

and change!

“If your spouse has lost their job you might have to change your goal,” says

Lyubomirsky. “Or you might have to learn a whole new skill for a new job.”

65. ________

When times are tough, it’s easy to get skip your regular workouts in favor of moping

in front of the TV and eating a bag of chips. Your thinking is “I have more important

things to worry about right now than looking good.”

But carve out a small part of your day to give your body some TLC. It will go a

long way in boosting your happiness. “Even if you can’t afford to go to the gym,”

Lyubomirsky says, “take time out to exercise at home.”

You don't need an expert to tell your that relationships are critical to happiness. Not

being the bread-winner anymore or not being able to fulfill your kid's needs can weigh

down hard on your family life. But the trick is to stop feeling guilty and focus on

bringing up your loved ones.