这章主要介绍 variou practitioners
首先是十个主要单词：
1.a student of human behavior : psychologist
2.follows the techniques devised by Sigmund Freud : psychoanalyst
3.taken postgraduate work in the straightening of teeth : orthodontist
4.measures your vision and prescribes the type of glasses : optometrist
5.grinds lenses : optician
6.uses manipulation and massage and massage as curative techniques : osteopath
7.treats minor ailments of the feet : podiatrist
8.manipulating most of the articulations of the body : chiropractor
9.. analyzes handwriting : graphologist
10.deals problems of the elderly : gerotologist
接着我们来分析各个单词的词根：
1.psyche~spirit,soul,mind
psychologist psychology psychological---------------logos~science,study
psychiatrist---------------------------------------------------iatreia~medical healing
psyche psychic
psychopathic psychopathy-------------------------------pathos~suffering,disease
psychosomatic----------------------------------------------soma~body
2.
psychoanalysis psychoanlyst psychoanalytic
psychogenic-------------------------------------------------genesis~bieth,origin
psychotherapy psychotherapist psychotherapeutic
3.orthos~straight,correct odontos~tooth
orthodontist
pedodontist pedodontia pedodontic--------------------paidos~child
periodontist---------------------------------------------------peri-~around,surrounding
endodontist---------------------------------------------------endon~inner,within
exodontist-----------------------------------------------------ex-~out
4.opsis,optikos~view,vision metron~mesurement
optometrist
thermometer-------------------------------------------------therme~heat
barometer barometric-------------------------------------baros~weight
sphygmomanometer---------------------------------------sphygmos~pulse
metric system
5.
optician
6.osteon~bone
osteopath osteopathy osteopathic
比较：orthopedist
7.pous,podos~foot iatreia~medical~healing
podiatrist
octopus---------------------------------------------------------okto~eight
platypus--------------------------------------------------------platys~broad,flat
podium--------------------------------------------------------- -ium~placewhere
tripod
8.cheir(chiro-)~hand
chiropody
chiropractor
chirography chirographer chirographic
chiromancy chiromancer chiromantic----------------------- -mancy~foretelling,prediction
9.graphein~write
graphologist graphology graphological
calligraphy calligrapher calligraphic-------------------------kallos~beauty
cacograph----------------------------------------------------------kakos~bad,harsh
cardiograph
photograph---------------------------------------------------------photos~light
phonograph--------------------------------------------------------phone~sound
telegraph-----------------------------------------------------------tele-~distance
biography
10.geros~old age , geron~old man
geriatrician gerontology gerontologist gerontological
senex~old
senile senility
senescent senescence
senior seniority
senate 参议院 元老院