Glossary entry (derived from question below)
Portuguese term
Esmerado
Proposed translations
Portugal
Maria Teresa Borges de Almeida 
30+ years translating EU documents
Native in: Portuguese (Variant: European/Portugal) 
Works in: English to Portuguese, French to Portuguese, Spanish to Portuguese, and 1 more.
conscientious
The conscientious reviewer, who is insightful, punctual and concise in expression, will be rewarded with even more work.
https://watermark.silverchair.com/172.pdf?token=AQECAHi208BE...
United Kingdom
Qualified
Native in: Portuguese 
, English
Works in: English to Portuguese, Portuguese to English, Swedish to Portuguese, and 11 more.
painstaking
Brazil
32 years engineering/law/contracts
Native in: English (Variant: US) , Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Portuguese to English
faultless
Brazil
IT Specialist • M.A. in Linguistics
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Spanish to Portuguese, Portuguese to English, and 1 more.
diligent
esmerado = cuidadoso; apurado; primoroso
https://www.infopedia.pt/dicionarios/lingua-portuguesa/esmer...
diligent = someone who is diligent works very hard and very carefully
(MacMillan)
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Note added at 19 mins (2018-02-21 16:22:14 GMT)
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Ex.:
Into the Fire - Google Books Result
https://books.google.com.br/books?isbn=1904433634
Acknowledgements
I would like to thank the following for their invaluable help: Peru, for its beauty, gifts and trials. The late Professor Glyn Davies, economist extraordinaire, diligent proofreader and beloved father...
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Luciano Eduardo de Oliveira
28 mins
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Obrigado, Luciano!
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Lais Leite
3 days 4 hrs
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Obrigado, padua!
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United States
25 + yrs. Business experience PORT- ENG
Native in: Portuguese , English
Works in: Portuguese to English, English to Portuguese
whimsical
Portuguese to English, English to Portug
Native in: English
Works in: Portuguese to English, English to Portuguese
my erstwhile ....
fastidious
Amy is a highly experienced writer, fastidious editor, passionate marketer, and social media infatuate. Since 2010, she’s worked in corporate communications, digital marketing, and strategic content planning.
https://www.movingphillyforward.org/who-we-are/
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