A placebo is a sugar pill，a harmless shot，or ail empty capsule．Even though they have no medicine in them , these things seem to make people well．The patient thinks it is medicine and begins to get better．How does this happen?

　　The study of the placebo opens up new knowledge about the way the human body can heal itself．It is as if there was a doctor in each of us．The doctor will heal the body for us if we let it．But it is not yet known just how the placebo works to heal the body．Some people say it works because the human mind fools itself．These people say that if the mind is fooled into thinking it got medicine，then it will act as if it did，and the body will feel better．

　　Placebos do not always work．The success of this treatment seems to rest a lot with the relationship between the patient and the doctor．If the patient has a lot of trust in the doctor and if the doctor really wants to help the patient，then the placebo is more likely to work．So in a way, the doctor is the most powerful placebo of all．

　　A placebo can also have bad effects．If patients expect a bad reaction to medicine，then they will also show a bad reaction to the placebo．This would seem to show that a lot of how you react to medicine is in your mind rather than in your body．Some doctors still think that if the placebo can have bad effects it should never be used．They think there is still not enough known about it．

【2017年高考英语一轮复习讲练测：必修3.4 Astronmy the science of the stars.（测）（解析版）】相关文章：

★ 2017届高考英语二轮复习书面表达限时测验：7（含解析）

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 9 B卷 Word版含解析

★ 【课堂新坐标】2017届高考英语（通用版）二轮复习书面表达专题训练：Ⅱ卷强化增分练 训练4（含解析）

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练：第4组（含解析）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修2 unit5《Music》

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修8 unit5《Meeting your ancestors》

★ 【三维设计】2017版（江苏专用）二轮复习练习：必修1 Unit 1《School life》单元检测（含解析）

★ 2017届高考英语二轮复习课时训练：16（含解析）

★ 【浙江专用】2014届高考英语一轮复习课时作业(十五)必修3Unit 5《Canada—“The True North”》

★ 【浙江专用】2014届高考英语一轮复习课时作业(二十三)必修5Unit 3《Life in the future》