這題好像可以選(B)
NSAIDs和corticosteroid在OA都可relieve pain
復健物理治療也沒錯
osteotomy屬於realigning bones，也可減輕疼痛
至於(B) arthroscopic surgery
2008 NEJM有篇文章：
A Randomized Trial of Arthroscopic Surgery for Osteoarthritis of the Knee
http://content.nejm.org/cgi/content/short/359/11/1097
Conclusions Arthroscopic surgery for osteoarthritis of the knee
provides no additional benefit to optimized physical and medical therapy.
UptoDate也有寫到：
The benefit of arthroscopic surgery in people with arthritis is controversial.
......A selected group of patients with arthritis may benefit from arthroscopy.
However, people with significant arthritis are more likely to benefit
from other types of surgery.
※ 引述《yoyi0819 (剉冰)》之銘言：
: p.34 18題
: 答案給D. 關節內注射類固醇
: 不過華盛頓內科手冊p.523有寫到
: 關節內注射葡萄糖皮質類固醇有幫助
: 所以.....
: 想問一下大家
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