Combine oil, vinegar, lemon juice, sugar, salt, Worcestershire sauce and bleu cheese in jar with tight-fitting cover. Shake well to blend; chill. Place lettuce in large bowl with celery, walnuts and raisins; cover and place in refrigerator to keep chilled until serving time. Wash, quarter and core apples; cut into bite-size chunks; add to salad bowl. Pour bleu cheese dressing over salad; toss lightly to mix.