忠實義務 忠誠義務 注意義務 善意義務 狹義忠誠義務 利害關係人交易 奪取公司機會 經營判斷原則 德拉瓦州公司法 加強司法審查 整體公平性 Fiduciary duties Duty of care Duty of good faith Duty of loyalty Business judgment rule Enhanced scrutiny Entire fairness Self-dealing Unocal/unitrin doctrine Delaware general corporation law