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plained. These changes appeared in a part of the brain involved in
processing anxiety. ''People who develop schizophrenia are known of-
ten to exhibit signs of raised anxiety levels up to two years before the
onset of full psychosis," the BBC pointed out.
Individuals in high-risk groups have, on average, a 13-percent
risk of developing schizophrenia. But if they exhibit brain changes of
the type pinpointed by the researchers, their risk of developing full-
blown psychosis rises to a massive 60 percent, the BBC said.
"Although there are no preventative treatments for the illness, an
accurate predictive test could help researchers to assess possibilities
for prevention in the future," Job told the BBC.
Jo Loughran, of the schizophrenia charity Rethink, welcomed the
research. "Schizophrenia is notoriously difficult to diagnose. There-
fore Rethink welcomes any new research or progress into understand-
ing the causes of schizophrenia," she told the BBC.
2. Give the summary of the text
3. Extract the key words , then analyze them according to the
principles of thesaurus-making up.