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【简答题】
Read the passage and decide whether the following statements are true (A) or false (B). Food Poisoning No matter how careful we are with our foods, food poisoning is commonly seen in our lives. Usually, it is mild, but sometimes it can be deadly. According to the Centers for Disease Control and Prevention (CDCP), one in six people in the United States becomes sick because of eating contaminated food. Worldwide, diarrhea is one of the leading causes of death. What can be the causes of food poisoning? In fact, 68% of all the cases were caused by unknown agents. And the known causes of food poisoning can be divided into two categories: infectious agents and toxic agents. Infectious agents include bacteria, viruses, and parasites while toxic agents include poisonous vegetables, foods prepared improperly, or pesticides left on fruits and vegetables. How can we know if someone has food poisoning? When the symptoms such as stomachache, diarrhea, fever, nausea, vomiting, abdominal cramps, headache, weakness, or dehydration occur after eating something (usually in 1-36 hours), we get the alarm of food poisoning. These symptoms can develop rapidly within 30 minutes or slowly worsen over days to weeks. Don’t panic if someone gets food poisoning at your home. When the symptoms are mild and last less than 24 hours, you can take care of the patients at home. First, do not eat solid food while nauseous or vomiting but drink plenty of fluids. This is to keep the patient hydrated. Do remember to avoid any alcoholic, caffeinated, or sugary drinks. Half-strength diluted sports drinks are fine for adults or else they contain too much sugar, which may worsen diarrhea. When nausea and vomiting have stopped and the patient can tolerate fluids, he can start eating slowly. Small amounts of plain foods that are easy on the stomach are your first choice. Generally speaking, we don’t need to use over-the-counter medicines to stop mild diarrhea. And we should know they are safe only when used as directed. Please keep in mind that these medications are not recommended to treat children. You’d better consult your pediatrician at first. For those severe cases, go to hospital at once. Doctors will perform a thorough examination, including measurements of BP, body temperature, breathing and heart rate. They will assess how dehydrated the patient is with the help of a urine sample test which may at the same time indicate possible kidney damage. And they will examine the abdominal area to make sure how serious the illness is. A rectal examination may be performed to make sure there are no breaks in the rectal wall. Then a sample of stool will be taken and tested for blood and mucus. In some cases, a sample of stool or vomit can be sent to the laboratory for further testing to find out which infectious or toxic agents caused the illness.
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参考答案:
举一反三
【判断题】在一个随机交配的大群体中,显性基因A的频率p=0.6,在平衡状态下,Aa基因型的频率应该是0.48。
A.
正确
B.
错误
【单选题】男性,25岁,2年来反复镜下血尿,下列哪种情况可诊断为镜下血尿
A.
尿沉渣每高倍视野红细胞为2个以上
B.
1小时红细胞计数>2万
C.
1小时红细胞计数>5万
D.
1小时红细胞计数>10万
E.
1小时红细胞计数>20万
【单选题】患者男,24岁。因汽油火焰烧伤5小时入急诊观察室,神志清楚,烦躁不安,四肢冰冷。烧 伤总面积55%,颈部、颜面部、前胸、双上肢为III度烧伤,背部、手掌、肩部为II度烧伤。白细 胞计数23× 10 9 /L ,中性粒细胞95%,淋巴细胞5%,白细胞形态学检查显示中性粒细胞毒性变。 不符合上述的改变是
A.
中性粒细胞大小不均
B.
空泡形成
C.
杜勒小体
D.
退行性变
E.
棒状小体
【多选题】组织中,雇主的( )会直接影响员工对组织的忠诚。
A.
霸气
B.
魄力
C.
能力
D.
正直
【单选题】急性泪囊炎治疗错误的是
A.
局部热敷
B.
全身和局部使用抗生素
C.
若脓肿形成,应切开排脓
D.
早期泪道冲洗,防止脓液留
E.
炎症消退后按慢性泪蒸炎处理
【判断题】在一个随机交配的大群体中,显性基因A的频率p=0.6,在平衡状态下,Aa基因型的频率应该是0.48。( )
A.
正确
B.
错误
【单选题】关于急性泪囊炎治疗方法叙述错误的是()
A.
滴抗生素眼水
B.
全身应用抗生素
C.
泪道冲洗
D.
早期热敷理疗
E.
脓肿出现波动感即切开排脓
【判断题】在一个随机交配的大群体中,显性基因 A 的频率 p=0.6,在平衡状态下,Aa 基因型的频率应该是 0.48。
A.
正确
B.
错误
【单选题】在一个随机交配的大群体中,显性表型的频率是0.19,那么杂合子Aa的频率是_______,显性基因的频率是_______。
A.
0.18;0.9
B.
0.81;0.1
C.
0.09;0.9
D.
0.18;0. 1
【单选题】下列哪种情况可诊断为镜下血尿( )
A.
新鲜尿离心沉渣没高倍镜视野红细胞>2个
B.
1小时尿红细胞记数>2万
C.
1小时尿红细胞记数5万
D.
小时尿红细胞记数>50万
E.
小时尿红细胞记数>10万
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