全文获取类型
收费全文 | 1746049篇 |
免费 | 125852篇 |
国内免费 | 5294篇 |
专业分类
耳鼻咽喉 | 22353篇 |
儿科学 | 56415篇 |
妇产科学 | 48522篇 |
基础医学 | 255211篇 |
口腔科学 | 46240篇 |
临床医学 | 165680篇 |
内科学 | 337915篇 |
皮肤病学 | 34034篇 |
神经病学 | 145198篇 |
特种医学 | 63335篇 |
外国民族医学 | 420篇 |
外科学 | 249250篇 |
综合类 | 38352篇 |
现状与发展 | 4篇 |
一般理论 | 878篇 |
预防医学 | 146659篇 |
眼科学 | 38520篇 |
药学 | 127237篇 |
7篇 | |
中国医学 | 4109篇 |
肿瘤学 | 96856篇 |
出版年
2021年 | 15360篇 |
2019年 | 16031篇 |
2018年 | 22231篇 |
2017年 | 16902篇 |
2016年 | 18368篇 |
2015年 | 21072篇 |
2014年 | 29270篇 |
2013年 | 45055篇 |
2012年 | 61697篇 |
2011年 | 65848篇 |
2010年 | 38447篇 |
2009年 | 35358篇 |
2008年 | 60556篇 |
2007年 | 64328篇 |
2006年 | 63902篇 |
2005年 | 62533篇 |
2004年 | 59763篇 |
2003年 | 56682篇 |
2002年 | 54640篇 |
2001年 | 72703篇 |
2000年 | 74231篇 |
1999年 | 62804篇 |
1998年 | 19319篇 |
1997年 | 17503篇 |
1996年 | 17067篇 |
1995年 | 16118篇 |
1994年 | 14962篇 |
1993年 | 14077篇 |
1992年 | 49113篇 |
1991年 | 48332篇 |
1990年 | 46828篇 |
1989年 | 44688篇 |
1988年 | 41331篇 |
1987年 | 40236篇 |
1986年 | 38381篇 |
1985年 | 36766篇 |
1984年 | 28057篇 |
1983年 | 24134篇 |
1982年 | 15304篇 |
1981年 | 13370篇 |
1979年 | 25166篇 |
1978年 | 18331篇 |
1977年 | 15162篇 |
1976年 | 14670篇 |
1975年 | 15104篇 |
1974年 | 18189篇 |
1973年 | 17776篇 |
1972年 | 16390篇 |
1971年 | 15252篇 |
1970年 | 14175篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
Jennifer Tuboku-Metzger Blakely Ronda L Sinkowitz-Cochran William R Jarvis 《Infection control and hospital epidemiology》2006,27(8):873-875
A 19-item survey instrument was designed and mailed by the Infectious Diseases Society of America to its membership to determine the media preferred by infectious diseases physicians for continuing medical education on general topics and on antimicrobial resistance. The objective of the survey was to offer the developers of educational programs knowledge on which to base more-effective ways to deliver educational materials to physicians in this specialty. 相似文献
92.
93.
Adriana B Campaner Alessandro Scapinelli Ruy O Machado Roberto E Dos Santos Geni W Beznos Tsutomu Aoki 《Gynecological endocrinology》2006,22(7):395-398
We report a case of a prepubertal girl with juvenile primary hypothyroidism presenting as ovarian cysts and precocious puberty. The 7-year-old female was referred to our clinic because of a pelvic/abdominal mass and vaginal bleeding. Besides these findings, on physical examination we noticed the thyroid gland globally increased and the presence of secondary sexual characteristics. Based upon the clinical profile and investigations, the patient was diagnosed with juvenile primary hypothyroidism due to autoimmune thyroiditis. The cysts and precocious puberty resolved spontaneously after the simple replacement of thyroid hormone. It is important to bear in mind hypothyroidism in cases of girls presenting ovarian cysts and precocious puberty in order to avoid unnecessary surgery on the ovaries. 相似文献
94.
95.
Elhaji Youssef A.; Stoica Ileana; Dennis Sheldon; Purisima Enrico O.; Lumbroso Rose; Beitel Lenore K.; Trifiro Mark A. 《Human molecular genetics》2006,15(9):1561
Human Molecular Genetics (2006) 15, 921931; 相似文献
96.
C G Arruda J M Aldrighi L A Bortolotto I N Alecrin J A F Ramires 《Gynecological endocrinology》2006,22(10):557-563
BACKGROUND: Arterial hypertension and postmenopausal reduction of estrogen levels may be involved in modifications of the stiffness of large arteries. OBJECTIVES: To evaluate the pulse-wave velocity (PWV) and indirectly the arterial stiffness in hypertensive postmenopausal women submitted to hormone therapy with estradiol alone or combined with norethisterone acetate. SUBJECTS: Forty-five hypertensive postmenopausal women were double-blindly, randomly assigned to three arms of treatment: placebo (group I); estradiol 2 mg/day (group II); or estradiol 2 mg/day and norethisterone acetate 1 mg/day (group III). METHODS: Arterial stiffness was assessed from PWV measurements of the common carotid and femoral arteries (CF-PWV) and the common carotid and radial arteries (CR-PWV) obtained using the automatic Complior(R) device, taken at baseline and after 12 weeks of treatment. RESULTS: After the 12-week treatment, values of CF-PWV and CR-PWV were not significantly different (p = 0.910 and p = 0.736, respectively) among the groups. Systolic blood pressure showed a positive correlation with CF-PWV in groups II and III (p = 0.02 and p < 0.001, respectively). CONCLUSIONS: PWV and arterial stiffness in postmenopausal hypertensive women did not reduce over a 12-week treatment with estradiol alone compared with the same period of treatment with estradiol combined with norethisterone acetate. 相似文献
97.
98.
99.
Abstract: Background: Identification of risk drinking in expectant fathers may be helpful as an important part of efforts to minimize maternal alcohol use, and as an opportunity to inform them about a problematic practice during a critical developmental stage for the couple. The purpose of this study was to evaluate the T‐ACE screening questionnaire, which asks about t olerance to alcohol, being a nnoyed by other's comments about drinking, attempts to c ut down, and having a drink first thing in the morning (“ e ye‐opener”), in the male partners of pregnant women who themselves were T‐ACE positive. Methods: Two hundred fifty‐four male partners were asked to complete the T‐ACE embedded in a health survey, the Alcohol Use Disorders Identification Test (AUDIT), and other questions about their alcohol use in the past 30 days when their pregnant partners had a median gestation of 11.5 weeks (T1). After delivery, male partners again completed the T‐ACE and quantity‐frequency questions (T2). The predictive ability of the T‐ACE and AUDIT was compared, using risk drinking (>4 drinks/day or >14 drinks/week) as the criterion standard. Results: A substantial minority of male partners had risk drinking, 31 percent at T1 and 25 percent at T2. Although the AUDIT was better than the T‐ACE as an independent predictor of risk drinking, the latter was most accurate when the tolerance threshold exceeded 2 drinks, the same established for pregnant women. The sensitivity (T1 = 84.6%, T2 = 82.8%) and specificity (T1 = 43.8%, T2 = 51.1%) of the T‐ACE at this threshold compared favorably with those of the AUDIT at the standard cut point of 8. Conclusions: The T‐ACE may be a practical way for clinicians to identify risk drinking in both pregnant women and expectant fathers. (BIRTH 33:2 June 2006) 相似文献
100.