全文获取类型
收费全文 | 488907篇 |
免费 | 50975篇 |
国内免费 | 2915篇 |
专业分类
耳鼻咽喉 | 9849篇 |
儿科学 | 16726篇 |
妇产科学 | 13407篇 |
基础医学 | 53992篇 |
口腔科学 | 9579篇 |
临床医学 | 55168篇 |
内科学 | 111099篇 |
皮肤病学 | 14096篇 |
神经病学 | 39999篇 |
特种医学 | 19451篇 |
外国民族医学 | 43篇 |
外科学 | 94016篇 |
综合类 | 8890篇 |
现状与发展 | 74篇 |
一般理论 | 206篇 |
预防医学 | 30526篇 |
眼科学 | 10830篇 |
药学 | 25001篇 |
中国医学 | 844篇 |
肿瘤学 | 29001篇 |
出版年
2023年 | 5337篇 |
2021年 | 6328篇 |
2020年 | 7824篇 |
2019年 | 5366篇 |
2018年 | 12067篇 |
2017年 | 10666篇 |
2016年 | 12219篇 |
2015年 | 12804篇 |
2014年 | 21214篇 |
2013年 | 24503篇 |
2012年 | 17886篇 |
2011年 | 18381篇 |
2010年 | 18267篇 |
2009年 | 21199篇 |
2008年 | 17339篇 |
2007年 | 16533篇 |
2006年 | 18687篇 |
2005年 | 15656篇 |
2004年 | 14367篇 |
2003年 | 12722篇 |
2002年 | 12123篇 |
2001年 | 17484篇 |
2000年 | 16956篇 |
1999年 | 15024篇 |
1998年 | 7064篇 |
1997年 | 6601篇 |
1996年 | 6242篇 |
1995年 | 6018篇 |
1994年 | 4533篇 |
1993年 | 3995篇 |
1992年 | 9923篇 |
1991年 | 10080篇 |
1990年 | 9510篇 |
1989年 | 9433篇 |
1988年 | 8504篇 |
1987年 | 8070篇 |
1986年 | 7738篇 |
1985年 | 7383篇 |
1984年 | 5477篇 |
1983年 | 4779篇 |
1982年 | 3145篇 |
1979年 | 4848篇 |
1978年 | 3657篇 |
1977年 | 3231篇 |
1975年 | 3179篇 |
1974年 | 3632篇 |
1973年 | 3671篇 |
1972年 | 3456篇 |
1971年 | 3181篇 |
1970年 | 3132篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Yuichiro Nakai MD DMSc Takeshi Maeda MD Junko Nishio MD DMSc Daisuke Tachibana MD Motoharu Imanaka MD DMSc Sachio Ogita MD DMSc 《The Australian & New Zealand journal of obstetrics & gynaecology》1998,38(4):469-471
EDITORIAL COMMENT: We accepted this case for publication to remind readers that although uterine rupture during labour in a primigravida is extremely uncommon it does occur, or at any rate nulliparas can develop abdominal pain and shock in labour with a haemoperitoneum resulting from a tear in a vein in the lower posterior uterine wall. When one sees the hugely dilated uterine and ovarian venous plexuses at Caesarean section it is easy to believe that bleeding from such a vessel during labour could be prodigious. This case suggests that a dilated vein with blood flow derangements may be the cause. Nonetheless, as the authors warn us, the necessary response is not a precise diagnosis, but rapid laparotomy. See also Editorial Comment to Chin MMS, Harvey JA, Duffy BL. Uterine rupture during labour in a primigravida. Aust NZ J Obstet Gynaecol 1996; 36: 210. 相似文献
42.
Patrick O'Donnell 《Irish journal of medical science》1997,166(1):57-59
The final events of Wolfe Tone’s short and stormy life are fairly common knowledge. He was captured on board the French flagshipHoche when the vessel surrendered to a superior British naval force off Lough Swilly on October 10, 1798. Despite his protests that he was entitled to normal prisoner-of-war treatment, he was brought in irons a month later to Dublin. A court martial was hurriedly convened and he was found guilty of treason on Saturday November 10 and condemned to be hanged two days later. According to the generally accepted version of subsequent events he cut his own throat early on the Monday morning. The assistant surgeon of the 5th Dragoon Guards dressed the wound “ — but only with a view to prolong life until the fatal hour of one o’clock”. This surgeon was Benjamin Lentaigne, a Royalist emigre from France. Despite the pleas of John Philpott Curran, a leading advocate of the day, the military authorities refused to allow any consultation with a civil surgeon. Was this just bloody mindedness or was there an even more sinister reason? Two possibilities come to mind. One was that the wound had been so incompetently treated that a consultant would have been forced to make adverse comments, the other that the throat wound was not due to a cutting injury but, to a bullet fired either deliberately or accidently and a knife or razor was then used to try and camouflage the original trauma. In 1812 Lentaigne published a pamphlet in Latin in which he made reference to an unusual neck would stating that “— the bullet passed through his throat...” There is no direct evidence that the victim was Tone, why did the writer not make this clear? It may be he was reluctant to expose the medico-military inefficiency or callousness or to jeopardise his son’s career. Whatever the true facts, the verdict must remain the Scots one of “Not proven”. 相似文献
43.
44.
An increase in the number of cases of tuberculosis, especially in children, has been observed recently. Post-vaccination conversion rate in babies immunised with BCG was assessed. Sensitization was detected as early as 4 weeks after BCG inoculation. Although 84.2% had physical evidence of BCG inoculation only 69.8% had developed detectable sensitization to the tubercle bacilli as shown by the Mantoux test. 相似文献
45.
46.
Most authors consider the principal advantage of FG anastomoses (compared to microsurgical anastomoses) to be shorter operating time, reduced surgical trauma to oviduct stumps, and absence of tissue ischemia. These features promote reparative regeneration and decrease adhesion formation, resulting in complete recanalization of fallopian tubes. To date, the majority of work on FG is confined to the experimental development of surgical techniques. Investigations in reconstructive gynecological surgery are quite uncommon. The physical properties of FG and the positive results of available experimental studies suggest that further development of surgical techniques using FG in obstetrics and gynecology is worthwhile. 相似文献
47.
Sustained eosinophil cationic protein release into tears after a single high-dose conjunctival allergen challenge 总被引:1,自引:0,他引:1
P. G. MONTAN M. VAN HAGE-HAMSTEN O. ZETTERSTRÖM† 《Clinical and experimental allergy》1996,26(10):1125-1130
Background The appearance of eosinophils is a hallmark sign of the allergic late-phase response (LPR). Eosinophil cationic protein (ECP), a readily measurable product released from activated eosinophils, has so far not been evaluated in the ocular LPR. Objective Two sets of trials were performed in order to investigate changes of local and systemic eosinophil activity and their possible link with symptoms and hyper-reactivity in the allergic LPR in the eye. Methods In the first experiment, ECP was analysed in tears and serum and the clinical reaction was evaluated during a 72-h time–course after a single, high-dose allergen challenge out of season in one eye of 15 pollen-sensitized volunteers. In a second experiment, the hypothesis of an increased clinical response to an allergen challenge in an eye that had been provoked with allergen 48h previously was tested in nine sensitized individuals. Results In the first experiment, symptoms at 10 min and 2, 4, 6, 8 and 24 h significantly exceeded base line scores of the challenged eyes. Tear ECP was significantly elevated in challenged eyes compared to contralateral eyes at 6, 8 and 24 h. In addition, symptoms and ECP release correlated significantly at the 24-h evaluation. Serum ECP remained unchanged throughout the study period. In the second experiment, conjunctival hyperreactivity 48h after an allergen challenge was not confirmed. Conclusion ECP secretion occurs in the experimental ocular LPR and is in part associated with the magnitude of the clinical reaction, which suggests a truly pathogenic role of the activated eosinophil in pollen-induced allergic conjunctivitis. 相似文献
48.
49.
50.
Recurrent erosion 总被引:1,自引:0,他引:1