Seasonal flu vaccinations began yesterday, leading to long lines at hospitals and health centers ______ the island.
(A) thorough
(B) through
(C) across
(D) overall

thorough (a.)

1.徹底的; 完全的

The film was a thorough success. 這電影獲得極大的成功。

You must promise me to take a thorough rest. 你得答應我徹底休息一下。

2.周密的; 完善的

The doctor was very thorough in his examination of the sick child. 醫生對生病的孩子進行了仔細的檢查。

3.十足的, 徹頭徹尾的[B]

He is a thorough scoundrel. 他是一個十足的無賴。

4.(人)十分仔細的

She is not brilliant, but she is thorough. 她並非才華橫溢, 但很仔細。

Seasonal flu vaccinations began yesterday, leading to long lines at hospitals and health centers across the island. 
譯：季節性流感疫苗接種於昨天開始，導致全島醫院和保健中心排起了長隊。

thank you