全文获取类型
收费全文 | 1515954篇 |
免费 | 106665篇 |
国内免费 | 2361篇 |
专业分类
耳鼻咽喉 | 21677篇 |
儿科学 | 50721篇 |
妇产科学 | 44742篇 |
基础医学 | 222654篇 |
口腔科学 | 41810篇 |
临床医学 | 128153篇 |
内科学 | 296058篇 |
皮肤病学 | 31692篇 |
神经病学 | 116447篇 |
特种医学 | 59389篇 |
外国民族医学 | 405篇 |
外科学 | 235707篇 |
综合类 | 33025篇 |
现状与发展 | 2篇 |
一般理论 | 459篇 |
预防医学 | 109350篇 |
眼科学 | 34751篇 |
药学 | 114540篇 |
1篇 | |
中国医学 | 3126篇 |
肿瘤学 | 80271篇 |
出版年
2018年 | 14733篇 |
2016年 | 12608篇 |
2015年 | 14479篇 |
2014年 | 19901篇 |
2013年 | 30492篇 |
2012年 | 40951篇 |
2011年 | 43724篇 |
2010年 | 26345篇 |
2009年 | 24702篇 |
2008年 | 42021篇 |
2007年 | 45771篇 |
2006年 | 46217篇 |
2005年 | 45075篇 |
2004年 | 43442篇 |
2003年 | 42106篇 |
2002年 | 41213篇 |
2001年 | 68395篇 |
2000年 | 70165篇 |
1999年 | 59527篇 |
1998年 | 16662篇 |
1997年 | 15023篇 |
1996年 | 15109篇 |
1995年 | 14346篇 |
1994年 | 13633篇 |
1993年 | 12624篇 |
1992年 | 47392篇 |
1991年 | 46906篇 |
1990年 | 46217篇 |
1989年 | 45039篇 |
1988年 | 41836篇 |
1987年 | 40931篇 |
1986年 | 39060篇 |
1985年 | 37294篇 |
1984年 | 27734篇 |
1983年 | 24112篇 |
1982年 | 14344篇 |
1981年 | 12608篇 |
1979年 | 26229篇 |
1978年 | 18514篇 |
1977年 | 15994篇 |
1976年 | 15036篇 |
1975年 | 16533篇 |
1974年 | 19479篇 |
1973年 | 18867篇 |
1972年 | 17914篇 |
1971年 | 16712篇 |
1970年 | 15619篇 |
1969年 | 14935篇 |
1968年 | 14002篇 |
1967年 | 12436篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
71.
P F Plouin D L Clement H Boccalon J Dormandy I Durand-Zaleski G Fowkes L Norgren T Brown 《International angiology》2003,22(4):333-339
Atherosclerotic renal artery stenosis (ARAS) may cause hypertension, progressive renal failure, and recurrent pulmonary edema. It typically occurs in high risk patients with coexistent vascular disease elsewhere. Most patients with ARAS are likely to die from coronary heart disease or stroke before end-stage renal failure occurs. Recent controlled trials have shown that most patients undergoing angioplasty to treat renovascular hypertension still need antihypertensive agents 6 or 12 months after the procedure. Nevertheless, the number of antihypertensive agents required to control blood pressure adequately is lower following angioplasty than for medication alone. Trials assessing the value of revascularization for preserving renal function or preventing clinical events are only in the early recruitment phase. Revascularization should be undertaken in patients with ARAS and resistant hypertension or heart failure, and probably in those with rapidly deteriorating renal function or with an increase in plasma creatinine levels during angiotensin-converting enzyme inhibition. With or without revascularization, medical therapy using antihypertensive, hypolipidemic and antiplatelet agents is necessary in almost all cases. 相似文献
72.
Is atrial fibrillation an inflammatory disorder? 总被引:2,自引:0,他引:2
I read with great interest the excellent review on the influenceof inflammation in the pathogenesis of atrial fibrillation (AF)by Boos 相似文献
73.
74.
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
75.
Andrea R Genazzani Hermann P G Schneider Nick Panay Esme A Nijland 《Gynecological endocrinology》2006,22(7):369-375
OBJECTIVES: To identify and describe current women's thoughts about the menopause, hormone treatment (HT) and perceptions about breast cancer. METHODS: Between December 2004 and January 2005, 4201 postmenopausal women in seven European countries were interviewed via a standardized computer-aided telephone interview protocol. RESULTS: Almost all women reported to have experienced climacteric symptoms, and 63% of the women rated them as being severe. Only 52% of women were aware of the benefits of HT for relief of climacteric symptoms. Although 84% felt that severe symptoms should be treated, only 40% had used HT at some point in time. Thirty-four percent of the women preferring treatment with natural products did so because of the risk of breast cancer associated with HT. HT was recognized by 59% of the women as one of the most important contributors to an increased breast cancer risk. Most women received their information about HT and breast cancer risk from the media. CONCLUSIONS: This European survey reveals that the majority of women experience climacteric symptoms but that their decision whether or not to use HT is highly dependent on their concern about breast cancer risk. An increase in knowledge of the benefits and risks of HT is required for women to make appropriate decisions about hormone use. 相似文献
76.
77.
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
78.
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
79.
80.
G N J Tytgat 《Acta chirurgica. Supplement》2002,(587):77-81
A true comparison of long-term medical and surgical treatment in gastro-oesophageal reflux disease (GORD) is impossible as few studies have been carried out with adequate randomisation of the patients and long-term evaluation of quality of life. In general the control of the reflux symptoms is roughly equal with medical and surgical treatment. However, surgery can cause other symptoms such as dysphagia or non-specific epigastric discomfort or pain in some patients, which reduces the overall efficacy in controlling the symptoms. Based on a cost utility analysis, Heudebert et al. came to the conclusion that medical treatment was their preferred strategy for most patients with severe erosive oesophagitis. 相似文献